{"id":4066,"date":"2026-09-17T12:35:00","date_gmt":"2026-09-17T12:35:00","guid":{"rendered":"https:\/\/www.cameraegg.org\/camerareview\/?p=4066"},"modified":"2026-09-17T12:41:23","modified_gmt":"2026-09-17T12:41:23","slug":"best-memory-card-for-canon-eos-r6-mark-iii","status":"publish","type":"post","link":"https:\/\/www.cameraegg.org\/camerareview\/best-memory-card-for-canon-eos-r6-mark-iii\/","title":{"rendered":"Best Memory Card for Canon EOS R6 Mark III"},"content":{"rendered":"<div class=\"gagen-article gagen-v2\">\n<div class=\"article-intro\">\n<p>The 32.5MP EOS R6 Mark III writes 7K RAW at 2600 Mbps and a 12 fps RAW burst past 1000 frames to slot 1: CFexpress Type B at 400 MB\/s. Slot 2 is UHS-II SD, and that movie has no SD option. SanDisk Extreme PRO CFexpress Type B matches the bus \u2014 VPG400, 900 MB\/s floor. <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">Check Extreme PRO CFexpress Type B on Amazon<\/a>.<\/p>\n<\/div>\n\n<div class=\"quick-picks-box\">\n  <div class=\"qp-header\">\n    <h2>Our Top Picks at a Glance<\/h2>\n    <p class=\"qp-sub\">Reviewed September 2026 \u00b7 EOS R6 Mark III \u00b7 CFexpress Type B + UHS-II SD \u00b7 7K RAW 2600 Mbps \u00b7 12 fps 1000+ RAW \u00b7 40 fps 150 RAW<\/p>\n  <\/div>\n  <div class=\"qp-cards\">\n    <div class=\"qp-card qp-card--gold\">\n      <span class=\"qp-num\">01<\/span>\n      <span class=\"qp-badge\">\ud83c\udfc6 Best Overall<\/span>\n      <strong class=\"qp-name\">SanDisk Extreme PRO CFexpress Type B<\/strong>\n      <div class=\"qp-rating\">\u2605\u2605\u2605\u2605\u2605 <span class=\"qp-score\">4.8 \/ 5.0<\/span> <span class=\"qp-reviews\">\u00b7 2026 pick<\/span><\/div>\n      <p class=\"qp-why\">Type B, VPG400, 900 MB\/s floor. Matches 7K RAW Standard and the 1000+ RAW burst on slot 1.<\/p>\n      <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=e6890-20&#038;linkCode=osi\" class=\"qp-btn\" target=\"_blank\" rel=\"nofollow sponsored noopener\">Check Price at Amazon<\/a>\n      <a href=\"#best-overall\" class=\"qp-jump\">Read full review \u2193<\/a>\n    <\/div>\n    <div class=\"qp-card qp-card--green\">\n      <span class=\"qp-num\">02<\/span>\n      <span class=\"qp-badge\">\ud83d\udc8e Best Value<\/span>\n      <strong class=\"qp-name\">SanDisk Extreme PRO UHS-II V90<\/strong>\n      <div class=\"qp-rating\">\u2605\u2605\u2605\u2605\u2606 <span class=\"qp-score\">4.5 \/ 5.0<\/span> <span class=\"qp-reviews\">\u00b7 2026 pick<\/span><\/div>\n      <p class=\"qp-why\">Slot 2. UHS-II V90, 300 \/ 300 MB\/s. Overflow, backup, and 4K Intra 30p on SD.<\/p>\n      <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB&#038;tag=e6890-20&#038;linkCode=osi\" class=\"qp-btn\" target=\"_blank\" rel=\"nofollow sponsored noopener\">Check Price at Amazon<\/a>\n      <a href=\"#best-value\" class=\"qp-jump\">Read full review \u2193<\/a>\n    <\/div>\n    <div class=\"qp-card qp-card--blue\">\n      <span class=\"qp-num\">03<\/span>\n      <span class=\"qp-badge\">\ud83d\udcb0 Budget Pick<\/span>\n      <strong class=\"qp-name\">Lexar 1800x GOLD UHS-II V60<\/strong>\n      <div class=\"qp-rating\">\u2605\u2605\u2605\u2605\u2606 <span class=\"qp-score\">4.2 \/ 5.0<\/span> <span class=\"qp-reviews\">\u00b7 2026 pick<\/span><\/div>\n      <p class=\"qp-why\">Slot 2 stills and 4K Long GOP. V60 \/ U3. Not the Intra 60p card, and never 7K RAW.<\/p>\n      <a href=\"https:\/\/www.amazon.com\/s?k=Lexar+Professional+1800x+SDXC+UHS-II&#038;tag=e6890-20&#038;linkCode=osi\" class=\"qp-btn\" target=\"_blank\" rel=\"nofollow sponsored noopener\">Check Price at Amazon<\/a>\n      <a href=\"#budget-pick\" class=\"qp-jump\">Read full review \u2193<\/a>\n    <\/div>\n  <\/div>\n<\/div>\n\n<div class=\"affiliate-disclosure\"><p><em>This page contains affiliate links. A purchase through those links may earn Cameraegg a commission at no extra cost to you.<\/em><\/p><\/div>\n\n<div class=\"info-module buying-guide\" id=\"who-should-buy\">\n  <h3>Who should buy what<\/h3>\n  <ul>\n    <li><strong>7K RAW, 4K Intra 60p, or 12 fps RAW past 400 frames:<\/strong> <a href=\"#best-overall\">SanDisk Extreme PRO CFexpress Type B<\/a> in slot 1.<\/li>\n    <li><strong>Overflow, backup, or 4K Intra 30p on slot 2:<\/strong> <a href=\"#best-value\">SanDisk Extreme PRO UHS-II V90<\/a>.<\/li>\n    <li><strong>Stills and 4K Long GOP on slot 2:<\/strong> <a href=\"#budget-pick\">Lexar 1800x GOLD UHS-II V60<\/a>.<\/li>\n    <li><strong>Cheaper Type B that still clears 400 MB\/s:<\/strong> see <a href=\"#lexar-cf-skip\">Lexar GOLD CFexpress Type B<\/a>.<\/li>\n  <\/ul>\n<\/div>\n\n<div class=\"table-container\">\n  <table class=\"comparison-table\">\n    <thead><tr><th>Card<\/th><th>Slot \/ class<\/th><th>Rated speed<\/th><th>R6 Mark III job<\/th><th>Buy<\/th><\/tr><\/thead>\n    <tbody>\n      <tr class=\"highlight-row\"><td><strong>SanDisk Extreme PRO CFexpress Type B<\/strong><\/td><td>Slot 1 \u00b7 Type B \u00b7 VPG400<\/td><td>3700 \/ 3500 MB\/s peak \u00b7 900 MB\/s min (128\u2013400 GB)<\/td><td>7K RAW Standard 400 MB\/s \u00b7 12 fps 1000+ RAW<\/td><td><a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=e6890-20&#038;linkCode=osi\" class=\"table-price-btn\" target=\"_blank\" rel=\"nofollow sponsored noopener\">Check price<\/a><\/td><\/tr>\n      <tr><td><strong>SanDisk Extreme PRO UHS-II V90<\/strong><\/td><td>Slot 2 \u00b7 UHS-II V90<\/td><td>300 \/ 300 MB\/s \u00b7 90 MB\/s min<\/td><td>Backup \/ overflow \u00b7 4K Intra 30p on SD<\/td><td><a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB&#038;tag=e6890-20&#038;linkCode=osi\" class=\"table-price-btn\" target=\"_blank\" rel=\"nofollow sponsored noopener\">Check price<\/a><\/td><\/tr>\n      <tr><td><strong>Lexar 1800x GOLD<\/strong><\/td><td>Slot 2 \u00b7 UHS-II V60<\/td><td>280 \/ 210 MB\/s (64\u2013128 GB)<\/td><td>Stills + 4K Long GOP (U3). Not Intra 60p.<\/td><td><a href=\"https:\/\/www.amazon.com\/s?k=Lexar+Professional+1800x+SDXC+UHS-II&#038;tag=e6890-20&#038;linkCode=osi\" class=\"table-price-btn\" target=\"_blank\" rel=\"nofollow sponsored noopener\">Check price<\/a><\/td><\/tr>\n      <tr><td><strong>Lexar GOLD CFexpress Type B<\/strong><\/td><td>Slot 1 \u00b7 Type B \u00b7 CFexpress 2.0<\/td><td>1750 \/ 1500 MB\/s \u00b7 1000 MB\/s sustained<\/td><td>Same 400 MB\/s floor, older 2.0 bus<\/td><td><a href=\"https:\/\/www.amazon.com\/s?k=Lexar+Professional+CFexpress+Type+B+GOLD&#038;tag=e6890-20&#038;linkCode=osi\" class=\"table-price-btn\" target=\"_blank\" rel=\"nofollow sponsored noopener\">Check price<\/a><\/td><\/tr>\n      <tr><td><strong>SanDisk Extreme PRO UHS-I<\/strong><\/td><td>UHS-I V30<\/td><td>UHS-I bus<\/td><td>Records on slot 2. Wrong bus for this body.<\/td><td><a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-I+V30&#038;tag=e6890-20&#038;linkCode=osi\" class=\"table-price-btn\" target=\"_blank\" rel=\"nofollow sponsored noopener\">Check price<\/a><\/td><\/tr>\n    <\/tbody>\n  <\/table>\n<\/div>\n\n<h2>How We Picked<\/h2>\n<div class=\"how-we-picked\">\n<p>Three sourced facts: two different slots, a 400 MB\/s CFexpress floor for 7K RAW, and Canon\u2019s own SD test card.<\/p>\n<ul>\n  <li><strong>Weigh the slots, then the movie that only one of them can take.<\/strong> <a href=\"https:\/\/cam.start.canon\/en\/C022\/manual\/html\/UG-11_Reference_0090.html\" target=\"_blank\" rel=\"noopener nofollow\">Canon EOS R6 Mark III specifications<\/a> and <a href=\"https:\/\/www.bhphotovideo.com\/c\/product\/1930517-REG\/canon_7084c010_eos_r6_mark_iii.html\" target=\"_blank\" rel=\"noopener nofollow\">B&#038;H 7084C010<\/a>: slot 1 is CFexpress Type B (CFexpress 2.0, VPG400, up to 8 TB); slot 2 is SD\/SDHC\/SDXC UHS-II. Mechanical \/ electronic first-curtain RAW burst: over 1000 frames on CFexpress, 400 on a 128 GB UHS-II SD card. Electronic shutter RAW: 150 \/ 140. 7K Standard RAW at 29.97p is 2600 Mbps and needs CFexpress 2.0 Type B at 400 MB\/s or more; the SD column is a dash.<\/li>\n  <li><strong>Match VPG400 to that 400 MB\/s floor.<\/strong> <a href=\"https:\/\/www.sandisk.com\/products\/memory-cards\/cfast-cfexpress-compactflash\/sandisk-extreme-pro-cfexpress-4-0-type-b\" target=\"_blank\" rel=\"noopener nofollow\">SanDisk Extreme PRO CFexpress 4.0 Type B<\/a>: VPG400 and VPG800 on 128\u2013400 GB, up to 3700 \/ 3500 MB\/s peak, 900 MB\/s minimum sustained write on those capacities. The camera speaks CFexpress 2.0; the VPG400 mark is what Canon lists, not the peak.<\/li>\n  <li><strong>Fill slot 2 to the class Canon tested, then size the CFexpress card for RAW minutes.<\/strong> Burst tables use a 128 GB UHS-II SD card. 4K Fine Long GOP is U3 on SD; XF-AVC S Intra High Quality at 29.97p asks V90, and Intra at 59.94p often cannot record to SD at all. Standard RAW at 29.97p is about 13 minutes on 256 GB and 3 minutes on 64 GB \u2014 256 GB is the travel size for slot 1.<\/li>\n<\/ul>\n<\/div>\n\n<h2>Detailed Reviews<\/h2>\n\n<div class=\"top-recommendation\" id=\"best-overall\" data-badge=\"best-overall\">\n  <div class=\"top-badge badge-best-overall\">\ud83c\udfc6 Best Overall<\/div>\n  <h3>SanDisk Extreme PRO CFexpress Type B <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" class=\"title-amazon-btn\" rel=\"nofollow noopener\">View on Amazon<\/a> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB\" target=\"_blank\" class=\"title-bh-btn\" rel=\"nofollow noopener\">View on B&#038;H<\/a><\/h3>\n  <div class=\"product-highlights\">\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Best For:<\/span> Slot 1 \u2014 7K RAW and the 1000+ RAW burst<\/div>\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Key Feature:<\/span> Type B \u00b7 VPG400 \u00b7 900 MB\/s min \u00b7 256 GB<\/div>\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Rating:<\/span> <span class=\"star-rating\">4.8 \/ 5.0 \u2605\u2605\u2605\u2605\u2605<\/span><\/div>\n  <\/div>\n  <table class=\"spec-table\">\n    <tr><th>SKU family<\/th><td>SDCFEB \u2014 <a href=\"https:\/\/www.sandisk.com\/products\/memory-cards\/cfast-cfexpress-compactflash\/sandisk-extreme-pro-cfexpress-4-0-type-b\" target=\"_blank\" rel=\"noopener nofollow\">SanDisk Extreme PRO CFexpress 4.0 Type B<\/a><\/td><\/tr>\n    <tr><th>Class<\/th><td>CFexpress Type B \u00b7 VPG400 \/ VPG800 (128\u2013400 GB)<\/td><\/tr>\n    <tr><th>Peak \/ floor<\/th><td>Up to 3700 \/ 3500 MB\/s \u00b7 900 MB\/s min sustained (128\u2013400 GB)<\/td><\/tr>\n    <tr><th>Capacity<\/th><td>Prefer 256 GB. 128 \/ 400 GB \/ 1\u20134 TB exist. Cards over 2 TB cannot update firmware.<\/td><\/tr>\n    <tr><th>Body job<\/th><td>Canon: 7K Standard RAW 400 MB\/s, SD not allowed \u00b7 12 fps RAW over 1000 frames<\/td><\/tr>\n  <\/table>\n  <p><strong>Why it fits the R6 Mark III.<\/strong> Slot 1 is Type B. 7K Standard RAW at 29.97p is 2600 Mbps and Canon\u2019s card column is 400 MB\/s CFexpress, not SD. SanDisk\u2019s 128\u2013400 GB cards carry VPG400 and a 900 MB\/s floor, which is the class Canon lists. Peak 3700 MB\/s is a reader figure; in camera the bus is CFexpress 2.0.<\/p>\n  <p>Buy 256 GB when RAW video is on the list \u2014 Canon\u2019s table is 13 minutes of Standard RAW 29.97p on 256 GB, 3 minutes on 64 GB. Skip this card only if slot 1 stays empty and the day never needs 7K RAW or Intra 60p; that is a slot-2 body, not this body\u2019s default.<\/p>\n  <p class=\"purchase-links\"><span class=\"amazon-region-btn\">Check Price on <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">Amazon US<\/a>, <a href=\"https:\/\/www.amazon.co.uk\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=pctest07-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">UK<\/a>, <a href=\"https:\/\/www.amazon.ca\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=pctestt-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">CA<\/a>, <a href=\"https:\/\/www.amazon.de\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=67990-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">DE<\/a> \u2192<\/span> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB\" target=\"_blank\" class=\"purchase-link-bh\" rel=\"nofollow noopener\">Check Price on B&#038;H<\/a><\/p>\n<\/div>\n\n<div class=\"top-recommendation\" id=\"best-value\" data-badge=\"best-value\">\n  <div class=\"top-badge badge-best-value\">\ud83d\udc8e Best Value<\/div>\n  <h3>SanDisk Extreme PRO SDXC UHS-II V90 <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" class=\"title-amazon-btn\" rel=\"nofollow noopener\">View on Amazon<\/a> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB\" target=\"_blank\" class=\"title-bh-btn\" rel=\"nofollow noopener\">View on B&#038;H<\/a><\/h3>\n  <div class=\"product-highlights\">\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Best For:<\/span> Slot 2 overflow, backup, and 4K Intra 30p<\/div>\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Key Feature:<\/span> UHS-II \u00b7 V90 \u00b7 300 \/ 300 MB\/s \u00b7 128 GB<\/div>\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Rating:<\/span> <span class=\"star-rating\">4.5 \/ 5.0 \u2605\u2605\u2605\u2605\u2606<\/span><\/div>\n  <\/div>\n  <table class=\"spec-table\">\n    <tr><th>SKU family<\/th><td>SDSDXDM \u2014 <a href=\"https:\/\/www.sandisk.com\/products\/memory-cards\/sd-cards\/sandisk-extreme-pro-uhs-ii-v90-sd\" target=\"_blank\" rel=\"noopener nofollow\">SanDisk Extreme PRO UHS-II V90<\/a><\/td><\/tr>\n    <tr><th>Class<\/th><td>UHS-II \u00b7 U3 \u00b7 V90 (90 MB\/s sustained)<\/td><\/tr>\n    <tr><th>Peak<\/th><td>Up to 300 MB\/s read and 300 MB\/s write<\/td><\/tr>\n    <tr><th>Capacity<\/th><td>Prefer 128 GB \u2014 the size Canon used for SD burst figures. 64 \/ 256 \/ 512 GB exist.<\/td><\/tr>\n    <tr><th>Body job<\/th><td>Canon SD burst tests: 128 GB UHS-II \u00b7 Intra High Quality 29.97p listed as V90<\/td><\/tr>\n  <\/table>\n  <p><strong>Why it is Value.<\/strong> Slot 2 is UHS-II. Canon measured SD bursts on a 128 GB UHS-II card: 400 RAW at 12 fps, 140 RAW at 40 fps. 4K Fine Long GOP is U3. XF-AVC S Intra High Quality at 29.97p is the row that asks V90 on SD. Extreme PRO V90 is that class, and 128 GB matches the test card.<\/p>\n  <p>Use it as overflow, as a simultaneous backup, or as the proxy card. Skip it when slot 2 only sees stills and Long GOP \u2014 that job is V60. It cannot take 7K RAW; that movie has no SD column.<\/p>\n  <p class=\"purchase-links\"><span class=\"amazon-region-btn\">Check Price on <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">Amazon US<\/a>, <a href=\"https:\/\/www.amazon.co.uk\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB&#038;tag=pctest07-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">UK<\/a>, <a href=\"https:\/\/www.amazon.ca\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB&#038;tag=pctestt-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">CA<\/a>, <a href=\"https:\/\/www.amazon.de\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB&#038;tag=67990-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">DE<\/a> \u2192<\/span> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB\" target=\"_blank\" class=\"purchase-link-bh\" rel=\"nofollow noopener\">Check Price on B&#038;H<\/a><\/p>\n<\/div>\n\n<div class=\"top-recommendation\" id=\"budget-pick\" data-badge=\"budget-pick\">\n  <div class=\"top-badge badge-budget\">\ud83d\udcb0 Budget Pick<\/div>\n  <h3>Lexar Professional 1800x SDXC UHS-II GOLD <a href=\"https:\/\/www.amazon.com\/s?k=Lexar+Professional+1800x+SDXC+UHS-II&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" class=\"title-amazon-btn\" rel=\"nofollow noopener\">View on Amazon<\/a> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=Lexar+Professional+1800x+SDXC+UHS-II\" target=\"_blank\" class=\"title-bh-btn\" rel=\"nofollow noopener\">View on B&#038;H<\/a><\/h3>\n  <div class=\"product-highlights\">\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Best For:<\/span> Slot 2 stills and 4K Long GOP, not Intra 60p<\/div>\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Key Feature:<\/span> V60 \u00b7 280 \/ 210 MB\/s on 64\u2013128 GB<\/div>\n    <div class=\"highlight-item\"><span class=\"highlight-label\">Rating:<\/span> <span class=\"star-rating\">4.2 \/ 5.0 \u2605\u2605\u2605\u2605\u2606<\/span><\/div>\n  <\/div>\n  <table class=\"spec-table\">\n    <tr><th>SKU family<\/th><td>Professional 1800x GOLD \u2014 <a href=\"https:\/\/americas.lexar.com\/product\/lexar-professional-1800x-sdxc-uhs-ii-card-gold-series\/\" target=\"_blank\" rel=\"noopener nofollow\">Lexar<\/a><\/td><\/tr>\n    <tr><th>Class<\/th><td>UHS-II \u00b7 U3 \u00b7 V60<\/td><\/tr>\n    <tr><th>Peak (64\u2013128 GB)<\/th><td>Up to 280 MB\/s read \u00b7 up to 210 MB\/s write<\/td><\/tr>\n    <tr><th>Peak (256 GB\u20131 TB)<\/th><td>280 \/ 205 MB\/s<\/td><\/tr>\n  <\/table>\n  <p><strong>Why it is Budget.<\/strong> V60 guarantees 60 MB\/s and U3. Canon\u2019s 4K Fine Long GOP row on SD is U3, so 1800x GOLD is the cheaper slot-2 card for stills and that movie. Intra High Quality at 59.94p has no SD option; Intra High Quality at 29.97p lists V90. Keep 7K RAW on the CFexpress card.<\/p>\n  <p>Skip this when slot 2 has to record Intra 30p or 60p, or when the 12 fps RAW buffer on SD (400 frames) is the point of the second door \u2014 step to V90. Pair it with a <a href=\"https:\/\/www.cameraegg.org\/camerareview\/best-flash-for-canon-eos-r6-mark-iii\/\">flash for this body<\/a> on a stills day, not as a substitute for slot 1.<\/p>\n  <p class=\"purchase-links\"><span class=\"amazon-region-btn\">Check Price on <a href=\"https:\/\/www.amazon.com\/s?k=Lexar+Professional+1800x+SDXC+UHS-II&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">Amazon US<\/a>, <a href=\"https:\/\/www.amazon.co.uk\/s?k=Lexar+Professional+1800x+SDXC+UHS-II&#038;tag=pctest07-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">UK<\/a>, <a href=\"https:\/\/www.amazon.ca\/s?k=Lexar+Professional+1800x+SDXC+UHS-II&#038;tag=pctestt-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">CA<\/a>, <a href=\"https:\/\/www.amazon.de\/s?k=Lexar+Professional+1800x+SDXC+UHS-II&#038;tag=67990-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">DE<\/a> \u2192<\/span> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=Lexar+Professional+1800x+SDXC+UHS-II\" target=\"_blank\" class=\"purchase-link-bh\" rel=\"nofollow noopener\">Check Price on B&#038;H<\/a><\/p>\n<\/div>\n\n<h2>If You Need Something Else<\/h2>\n<p>A cheaper Type B card still clears Canon\u2019s 400 MB\/s floor. A UHS-I card still records on slot 2. Neither is the default kit.<\/p>\n\n<div class=\"top-recommendation\" id=\"lexar-cf-skip\" data-badge=\"also-great\">\n  <div class=\"top-badge badge-also-great\">Also consider<\/div>\n  <h3>Lexar Professional CFexpress Type B GOLD <a href=\"https:\/\/www.amazon.com\/s?k=Lexar+Professional+CFexpress+Type+B+GOLD&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" class=\"title-amazon-btn\" rel=\"nofollow noopener\">View on Amazon<\/a> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=Lexar+Professional+CFexpress+Type+B+GOLD\" target=\"_blank\" class=\"title-bh-btn\" rel=\"nofollow noopener\">View on B&#038;H<\/a><\/h3>\n  <table class=\"spec-table\">\n    <tr><th>SKU family<\/th><td>CFexpress 2.0 Type B GOLD \u2014 <a href=\"https:\/\/americas.lexar.com\/product\/lexar-professional-cfexpress-type-b-card-gold-series\/\" target=\"_blank\" rel=\"noopener nofollow\">Lexar<\/a><\/td><\/tr>\n    <tr><th>Peak \/ sustained<\/th><td>Up to 1750 MB\/s read \u00b7 1500 MB\/s write \u00b7 1000 MB\/s sustained<\/td><\/tr>\n    <tr><th>Capacities<\/th><td>128 \/ 256 GB<\/td><\/tr>\n  <\/table>\n  <p>This is CFexpress 2.0, the bus Canon lists. 1000 MB\/s sustained still sits above the 400 MB\/s RAW movie floor. Take it when Extreme PRO 4.0 is the expensive row and 256 GB is enough. It is not VPG400 on Lexar\u2019s sheet \u2014 the SanDisk card is, which is why Extreme PRO stays Overall. A <a href=\"https:\/\/www.cameraegg.org\/camerareview\/best-starter-lens-for-canon-eos-r6-mark-iii\/\">starter RF lens<\/a> does not change the slot.<\/p>\n  <p class=\"purchase-links\"><span class=\"amazon-region-btn\">Check Price on <a href=\"https:\/\/www.amazon.com\/s?k=Lexar+Professional+CFexpress+Type+B+GOLD&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">Amazon US<\/a>, <a href=\"https:\/\/www.amazon.co.uk\/s?k=Lexar+Professional+CFexpress+Type+B+GOLD&#038;tag=pctest07-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">UK<\/a>, <a href=\"https:\/\/www.amazon.ca\/s?k=Lexar+Professional+CFexpress+Type+B+GOLD&#038;tag=pctestt-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">CA<\/a>, <a href=\"https:\/\/www.amazon.de\/s?k=Lexar+Professional+CFexpress+Type+B+GOLD&#038;tag=67990-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">DE<\/a> \u2192<\/span> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=Lexar+Professional+CFexpress+Type+B+GOLD\" target=\"_blank\" class=\"purchase-link-bh\" rel=\"nofollow noopener\">Check Price on B&#038;H<\/a><\/p>\n<\/div>\n\n<div class=\"top-recommendation\" id=\"uhs1-skip\" data-badge=\"also-great\">\n  <div class=\"top-badge badge-also-great\">Also consider<\/div>\n  <h3>SanDisk Extreme PRO UHS-I V30 <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-I+V30&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" class=\"title-amazon-btn\" rel=\"nofollow noopener\">View on Amazon<\/a> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=SanDisk+Extreme+PRO+SDXC+UHS-I+V30\" target=\"_blank\" class=\"title-bh-btn\" rel=\"nofollow noopener\">View on B&#038;H<\/a><\/h3>\n  <table class=\"spec-table\">\n    <tr><th>Bus<\/th><td>UHS-I \u00b7 V30<\/td><\/tr>\n    <tr><th>This body<\/th><td>Slot 2 is UHS-II. Slot 1 is CFexpress Type B.<\/td><\/tr>\n    <tr><th>Use<\/th><td>Fine in a UHS-I camera. Wrong bus for the R6 Mark III\u2019s SD door.<\/td><\/tr>\n  <\/table>\n  <p>Keep a UHS-I Extreme PRO in another body. Put UHS-II V90 in this side door and CFexpress in slot 1, with a <a href=\"https:\/\/www.cameraegg.org\/camerareview\/best-travel-accessories-for-canon-eos-r6-mark-iii\/\">travel kit for this body<\/a> in the bag \u2014 not a UHS-I card borrowed from an older Rebel.<\/p>\n  <p class=\"purchase-links\"><span class=\"amazon-region-btn\">Check Price on <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-I+V30&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">Amazon US<\/a>, <a href=\"https:\/\/www.amazon.co.uk\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-I+V30&#038;tag=pctest07-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">UK<\/a>, <a href=\"https:\/\/www.amazon.ca\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-I+V30&#038;tag=pctestt-20&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">CA<\/a>, <a href=\"https:\/\/www.amazon.de\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-I+V30&#038;tag=67990-21&#038;linkCode=osi\" target=\"_blank\" rel=\"nofollow noopener\">DE<\/a> \u2192<\/span> <a href=\"https:\/\/www.bhphotovideo.com\/c\/search?BI=8941&#038;KBID=10361&#038;SID=12345&#038;DFF=d50&#038;Ntt=SanDisk+Extreme+PRO+SDXC+UHS-I+V30\" target=\"_blank\" class=\"purchase-link-bh\" rel=\"nofollow noopener\">Check Price on B&#038;H<\/a><\/p>\n<\/div>\n\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-module\">\n  <div class=\"faq-item\"><h3>Why CFexpress Type B on this body<\/h3><p>Canon\u2019s spec sheet puts CFexpress Type B, CFexpress 2.0 and VPG400 on slot 1. 7K Standard RAW at 29.97p is 2600 Mbps and the SD column is blank. B&#038;H lists the same split: Type B up to 8 TB, SD UHS-II.<\/p><\/div>\n  <div class=\"faq-item\"><h3>Whether 7K RAW can record to the SD slot<\/h3><p>No. Canon marks Standard RAW and several Intra 59.94p rows as CFexpress-only. Slot 2 still handles 4K Long GOP (U3) and some Intra rates (V60 or V90 depending on the row).<\/p><\/div>\n  <div class=\"faq-item\"><h3>Why 256 GB on slot 1 instead of 64 GB<\/h3><p>Canon\u2019s time table for Standard RAW 29.97p is 3 minutes on 64 GB, 13 minutes on 256 GB, 51 minutes on 1 TB. 256 GB is the travel size when that codec is in play. Cards over 2 TB also cannot run a firmware update.<\/p><\/div>\n  <div class=\"faq-item\"><h3>Whether V60 is enough on slot 2<\/h3><p>For stills and 4K Fine Long GOP, Canon lists U3. V60 includes U3. Intra High Quality at 29.97p lists V90; Intra High Quality at 59.94p has no SD option. The 12 fps RAW buffer on SD is 400 frames against 1000+ on CFexpress.<\/p><\/div>\n  <div class=\"faq-item\"><h3>Whether a CFexpress 4.0 card works in the R6 Mark III<\/h3><p>The camera lists CFexpress 2.0 and VPG400. A Type B 4.0 card is the same physical slot and falls back to 2.0 in camera. Buy on VPG400 and the 400 MB\/s floor, not on the 3700 MB\/s reader peak.<\/p><\/div>\n<\/div>\n\n<h2>Final Verdict<\/h2>\n<div class=\"conclusion-module verdict-box\">\n  <div class=\"verdict-picks\">\n    <div class=\"verdict-item\">\n      <span class=\"verdict-label\">\ud83c\udfc6 Best Overall:<\/span>\n      <div class=\"verdict-product\"><strong>SanDisk Extreme PRO CFexpress Type B<\/strong> <span class=\"verdict-reason\">\u2013 VPG400; 900 MB\/s floor; 256 GB in slot 1.<\/span><\/div>\n      <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+CFexpress+Type+B+256GB&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" class=\"verdict-btn\" rel=\"nofollow noopener\">Buy Now<\/a>\n    <\/div>\n    <div class=\"verdict-item\">\n      <span class=\"verdict-label\">\ud83d\udc8e Best Value:<\/span>\n      <div class=\"verdict-product\"><strong>SanDisk Extreme PRO UHS-II V90<\/strong> <span class=\"verdict-reason\">\u2013 slot 2; 300 \/ 300 MB\/s; 128 GB.<\/span><\/div>\n      <a href=\"https:\/\/www.amazon.com\/s?k=SanDisk+Extreme+PRO+SDXC+UHS-II+V90+128GB&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" class=\"verdict-btn\" rel=\"nofollow noopener\">Buy Now<\/a>\n    <\/div>\n    <div class=\"verdict-item\">\n      <span class=\"verdict-label\">\ud83d\udcb0 Budget Pick:<\/span>\n      <div class=\"verdict-product\"><strong>Lexar 1800x GOLD UHS-II V60<\/strong> <span class=\"verdict-reason\">\u2013 slot 2 stills and Long GOP; not Intra 60p.<\/span><\/div>\n      <a href=\"https:\/\/www.amazon.com\/s?k=Lexar+Professional+1800x+SDXC+UHS-II&#038;tag=e6890-20&#038;linkCode=osi\" target=\"_blank\" class=\"verdict-btn\" rel=\"nofollow noopener\">Buy Now<\/a>\n    <\/div>\n  <\/div>\n  <p class=\"verdict-summary\">For the EOS R6 Mark III, put SanDisk Extreme PRO CFexpress Type B in slot 1. Fill slot 2 with Extreme PRO UHS-II V90 when that door has to keep up, or 1800x GOLD V60 when it only sees stills and Long GOP. Leave UHS-I cards in UHS-I cameras. 7K RAW does not have an SD option.<\/p>\n<\/div>\n<p><strong>Buying around the autumn sale?<\/strong> Cards are one of the few categories that discount reliably in October. Our guide to <a href=\"https:\/\/www.cameraegg.org\/camerareview\/amazon-prime-big-deal-days-2026-camera-gear\/\">Prime Big Deal Days 2026 (October 6\u20137)<\/a> covers which speed classes are worth stocking up on and which prices are just resets.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>The EOS R6 Mark III writes 7K RAW at 2600 Mbps to a CFexpress Type B slot Canon rates at 400 MB\/s, with UHS-II SD in slot 2. SanDisk Extreme PRO CFexpress Type B is the Overall pick for that bus.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[6,25],"tags":[202,429],"class_list":["post-4066","post","type-post","status-publish","format-standard","hentry","category-canon","category-memory-card","tag-canon-eos-r6-mark-iii","tag-cfexpress-type-b"],"_links":{"self":[{"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/posts\/4066","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/comments?post=4066"}],"version-history":[{"count":3,"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/posts\/4066\/revisions"}],"predecessor-version":[{"id":9958,"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/posts\/4066\/revisions\/9958"}],"wp:attachment":[{"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/media?parent=4066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/categories?post=4066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cameraegg.org\/camerareview\/wp-json\/wp\/v2\/tags?post=4066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}