![]() The entire File Allocation Table (FAT) family, exFAT included, is used for embedded systems because it is lightweight and is better suited for solutions that have low memory and low power requirements, and can be easily implemented in firmware.īecause file size references are stored in eight instead of four bytes, the file size limit has increased to 16 exabytes (EB) ( 2 64 − 1 bytes, or about 10 19 bytes, which is otherwise limited by a maximum volume size of 128 PB, or 2 57 − 1 bytes), raised from 4 GB ( 2 32 − 1 bytes) in a standard FAT32 file system. Most of the vendors signing on for licenses are manufacturers of embedded systems or device manufacturers that produce media formatted with exFAT. An update for Windows XP and Windows Server 2003 was later released. Support was added to regular Windows with Windows Vista Service Pack 1 and Windows Server 2008, both released on February 4, 2008. History ĮxFAT was introduced in late 2006 as part of Windows CE 6.0, an embedded Windows operating system. Windows 8 and later versions natively support exFAT boot, and support the installation of the system in a special way to run in the exFAT volume. 4 GB) is required.ĮxFAT has been adopted by the SD Association as the default file system for SDXC cards larger than 32 GB. ĮxFAT can be used where NTFS is not a feasible solution (due to data-structure overhead), but where a greater file-size limit than that of the standard FAT32 file system (i.e. Microsoft owns patents on several elements of its design. exFAT was proprietary until 28 August 2019, when Microsoft published its specification.
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