Editing SD card (section)

===SDXC===
The Secure Digital eXtended Capacity (SDXC) format, announced in January 2009 and defined in version 3.01 of the SD specification, supports cards up to 2&nbsp;TB,{{efn|name="here, 1&nbsp;TB = 1024"}} compared to a limit of 32&nbsp;GB{{efn|name="GiB"}} for SDHC cards in the SD 2.0 specification. SDXC adopts Microsoft's [[exFAT]] file system as a mandatory feature.<ref>{{Cite web |url=https://www.sdcard.org/developers/overview/capacity/ |title=Capacity (SD/SDHC/SDXC) |website=SD Association |language=en |access-date=2017-03-20 |archive-date=2011-11-21 |archive-url=https://web.archive.org/web/20111121064806/https://www.sdcard.org/developers/overview/capacity/ |url-status=live}}</ref>

Version 3.01 also introduced the Ultra High Speed (UHS) bus for both SDHC and SDXC cards, with interface speeds from 50&nbsp;MB/s to 104&nbsp;MB/s for four-bit UHS-I bus.<ref name="BS">{{cite web |title=Bus Speed (Default Speed/ High Speed/ UHS) |url=https://www.sdcard.org/developers/overview/bus_speed/ |website=SD Association |access-date=20 March 2017 |language=en |archive-date=4 October 2016 |archive-url=https://web.archive.org/web/20161004053633/https://www.sdcard.org/developers/overview/bus_speed/ |url-status=live}}</ref> (this number has since been exceeded with SanDisk proprietary technology for 170&nbsp;MB/s read, which is not proprietary anymore, as Lexar has the 1066x running at 160&nbsp;MB/s read and 120&nbsp;MB/s write via UHS&nbsp;1, and Kingston also has their Canvas Go! Plus, also running at 170&nbsp;MB/s).<ref>{{Cite web |title=Lexar Professional 1066x microSDXC UHS-I Card SILVER Series |url=https://www.lexar.com/portfolio_page/professional-1066x-microsdhcmicrosdxc-uhs-i-cards-silver-series/ |access-date=2021-04-10 |website=Lexar |language=en |archive-url=https://web.archive.org/web/20210410090638/https://www.lexar.com/portfolio_page/professional-1066x-microsdhcmicrosdxc-uhs-i-cards-silver-series/ |archive-date=2021-04-10}}</ref><ref>{{Cite web |title=SanDisk Extreme PRO SDHC And SDXC UHS-I Card |url=https://shop.westerndigital.com/products/memory-cards/sandisk-extreme-pro-uhs-i-sd#SDSDXXY-064G-GN4IN |access-date=2021-04-10 |website=shop.westerndigital.com |archive-date=2021-04-10 |archive-url=https://web.archive.org/web/20210410090637/https://shop.westerndigital.com/products/memory-cards/sandisk-extreme-pro-uhs-i-sd#SDSDXXY-064G-GN4IN |url-status=live}}</ref><ref>{{Cite web |title=Canvas Go! Plus Class 10 SD Cards – UHS-I, U3, V30 – 64&nbsp;GB–512&nbsp;GB |url=https://www.kingston.com/en/memory-cards/canvas-go-plus-sd-card |access-date=2021-04-10 |website=Kingston Technology Company |language=en-US |archive-date=2021-10-11 |archive-url=https://web.archive.org/web/20211011111151/https://www.kingston.com/en/memory-cards/canvas-go-plus-sd-card |url-status=live}}</ref><ref>{{Cite web |title=Canvas Go! Plus Class 10 microSD Cards – V30, A2 – 64&nbsp;GB–512&nbsp;GB |url=https://www.kingston.com/en/memory-cards/canvas-go-plus-microsd-card |access-date=2021-04-10 |website=Kingston Technology Company |language=en-US}}</ref>

Version 4.0, introduced in June 2011, allows speeds of 156&nbsp;MB/s to 312&nbsp;MB/s over the four-lane (two differential lanes) UHS-II bus, which requires an additional row of physical pins.<ref name="BS"/>

Version 5.0 was announced in February 2016 at CP+ 2016, and added "Video Speed Class" ratings for UHS cards to handle higher resolution video formats like [[8K resolution|8K]].<ref name="sda_video_speed">{{cite web | url = https://www.sdcard.org/press/New_SD_Association_Speed_Class_Supports_8K_and_Multi_File_Video_Recording.pdf |date=2016-02-26 |title=NEW SD ASSOCIATION VIDEO SPEED CLASS SUPPORTS 8K AND MULTI-FILE VIDEO RECORDING | publisher = SD Association | access-date = 2016-03-03 | archive-date = 2016-03-07 |archive-url=https://web.archive.org/web/20160307192442/https://www.sdcard.org/press/New_SD_Association_Speed_Class_Supports_8K_and_Multi_File_Video_Recording.pdf |url-status=dead}}</ref><ref>{{cite web |url=http://www.anandtech.com/show/10105/sd-association-announces-50-specification |title=SD Association Announces SD 5.0 Specification: SD Cards For UHD and 360° Video Capture |date=2016-03-01 |first=Anton |last=Shilov |publisher=Anand Tech |access-date=2016-03-03 |archive-date=2016-03-03 |archive-url=https://web.archive.org/web/20160303190529/http://www.anandtech.com/show/10105/sd-association-announces-50-specification |url-status=live}}</ref> The new ratings define a minimal write speed of 90&nbsp;MB/s.<ref name="sd50_video_speed">{{cite web |url=https://www.sdcard.org/downloads/pls/latest_whitepapers/Video_Speed_Class-The_new_capture_protocol_of_SD_5.0.pdf |title=Video Speed Class: The new capture protocol of SD 5.0 |publisher=SD Association |date=February 2016 |access-date=2016-03-03 |archive-date=2016-12-23 |archive-url=https://web.archive.org/web/20161223213758/https://www.sdcard.org/downloads/pls/latest_whitepapers/Video_Speed_Class-The_new_capture_protocol_of_SD_5.0.pdf |url-status=dead}}</ref><ref>{{cite web |url=https://www.cinema5d.com/new-video-speed-class-for-sd-cards/ |title=New Video Speed Class for SD Cards |first=Fabian |last=Chaundy |date=2016-02-26 |work=cinema5D |access-date=2016-03-03 |archive-date=2016-03-07 |archive-url=https://web.archive.org/web/20160307015103/https://www.cinema5d.com/new-video-speed-class-for-sd-cards/ |url-status=live}}</ref>

SDXC cards are required to be formatted using [[exFAT]],<ref name="CS" /> but many operating systems will support others.{{citation needed|date=October 2024}}

[[Windows Vista]] (SP1) and later<ref>{{cite web |title=Notable Changes in Windows Vista Service Pack 1 |url=https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-vista/cc709618(v=ws.10) |department=[[Microsoft TechNet|TechNet]] |website=[[Microsoft Docs]] |date=25 July 2008 |access-date=2021-11-07 |archive-date=2021-11-07 |archive-url=https://web.archive.org/web/20211107193722/https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-vista/cc709618(v=ws.10) |url-status=live }}</ref> and [[OS X]] (10.6.5 and later) have native support for exFAT.<ref>{{cite web |url=http://support.apple.com/kb/HT3553 |title=About the SD and SDXC card slots |publisher=Apple Inc. |date=2011-05-03 |access-date=2011-09-05 |archive-date=2011-09-03 |archive-url=https://web.archive.org/web/20110903100124/http://support.apple.com/kb/HT3553 |url-status=live }}</ref><ref>{{cite web |url=http://www.tuxera.com/mac/apple-released-exfat-support-in-os-x-10-6-5-update/ |title=Apple released exFAT support in OS X 10.6.5 update |publisher=Tuxera.com |date=2010-11-22 |access-date=2012-01-04 |archive-date=2012-05-13 |archive-url=https://web.archive.org/web/20120513202527/http://www.tuxera.com/mac/apple-released-exfat-support-in-os-x-10-6-5-update/ |url-status=dead }}</ref> (Windows XP and Server 2003 can support exFAT via an optional update from Microsoft.)<ref>{{cite web|url=https://support.microsoft.com/en-us/kb/955704|title=Description of the exFAT file system driver update package|publisher=Microsoft|date=2011-10-08|access-date=2015-11-27|archive-url=https://web.archive.org/web/20150511025138if_/https://support.microsoft.com/en-us/kb/955704|archive-date=2015-05-11}}</ref>

Most [[Berkeley Software Distribution|BSD]] and [[Linux]] distributions did not have exFAT support for legal reasons, though in Linux kernel 5.4 Microsoft open-sourced the spec and allowed the inclusion of an exFAT driver.<ref>{{cite web |url=https://www.phoronix.com/scan.php?page=news_item&px=Linux-5.4-exFAT-Is-Coming |title=The Initial exFAT Driver Queued For Introduction With The Linux 5.4 Kernel |publisher=phoronix.com |date=2019-08-30 |access-date=2020-02-05 |archive-date=2019-12-18 |archive-url=https://web.archive.org/web/20191218061425/https://www.phoronix.com/scan.php?page=news_item&px=Linux-5.4-exFAT-Is-Coming |url-status=live }}</ref> Users of older kernels or BSD can manually install third-party implementations of exFAT (as a [[Filesystem in Userspace|FUSE]] module) in order to be able to mount exFAT-formatted volumes.<ref>{{cite web |url=https://code.google.com/p/exfat/ |title=exFAT for BSD and Linux systems from Google Code |access-date=2014-01-02 |archive-date=2014-01-11 |archive-url=https://web.archive.org/web/20140111120127/http://code.google.com/p/exfat/ |url-status=live }}</ref> However, SDXC cards can be reformatted to use any file system (such as [[ext4]], [[Unix File System|UFS]], [[VFAT]] or [[NTFS]]), alleviating the restrictions associated with exFAT availability.

The SD Association provides a formatting utility for Windows and Mac OS X that checks and formats SD, SDHC, SDXC and SDUC cards.<ref>{{cite web |url=https://www.sdcard.org/downloads/formatter_4/ |title=SD Formatter 4.0 for SD/SDHC/SDXC – SD Association |publisher=Sdcard.org |access-date=2014-01-02 |archive-date=2014-02-07 |archive-url=https://web.archive.org/web/20140207233443/https://www.sdcard.org/downloads/formatter_4/ |url-status=live }}</ref>

Except for the change of file system, SDXC cards are mostly backward compatible with SDHC readers, and many SDHC host devices can use SDXC cards if they are first reformatted to the FAT32 file system.<ref>{{cite web |title=Updated: How to upgrade your 3DS SD card, to 64GB and beyond |author=deKay |date=15 January 2015 |website=Lofi-Gaming |url=https://lofi-gaming.org.uk/blog/2013/10/25/updated-how-to-upgrade-your-3ds-sd-card-to-64gb-and-beyond/ |access-date=2018-12-21 |archive-date=2018-12-21 |archive-url=https://web.archive.org/web/20181221134714/https://lofi-gaming.org.uk/blog/2013/10/25/updated-how-to-upgrade-your-3ds-sd-card-to-64gb-and-beyond/ |url-status=live }}</ref><ref>{{cite web |title=Ask Hackaday: How On Earth Can A 2004 MP3 Player Read An SDXC Card? |first=Jenny |last=List |date=29 November 2017 |website=Hackaday |url=https://hackaday.com/2017/11/29/ask-hackaday-how-on-earth-can-a-2004-mp3-player-read-an-sdxc-card/ |access-date=2018-12-21 |archive-date=2018-12-21 |archive-url=https://web.archive.org/web/20181221182601/https://hackaday.com/2017/11/29/ask-hackaday-how-on-earth-can-a-2004-mp3-player-read-an-sdxc-card/ |url-status=live }}</ref><ref>{{cite web |title=High capacity microSD cards and Android – Gary explains |first=Gary |last=Sims |date=9 May 2016 |website=Android Authority |url=https://www.androidauthority.com/high-capacity-microsd-cards-android-gary-explains-690710/ |access-date=2018-12-21 |archive-date=2018-11-22 |archive-url=https://web.archive.org/web/20181122092400/https://www.androidauthority.com/high-capacity-microsd-cards-android-gary-explains-690710/ |url-status=live }}</ref>