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. 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 was introduced in late 2006 as part of Windows CE 6.0, an embedded Windows operating system. ĮxFAT can be used where NTFS is not a feasible solution (due to data-structure overhead), but a greater file-size limit than 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. Linux (mainline kernel driver for kernels 5.4 and later and FUSE )ĮxFAT ( Extensible File Allocation Table) is a file system introduced by Microsoft in 2006 and optimized for flash memory such as USB flash drives and SD cards.Windows XP (including 圆4) SP2 and later (optional ).
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