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The Guardian - UK
The Guardian - UK
Technology
Jack Schofield

USB limits on the number of files

Is there a restriction on the number of files that can be saved to a USB drive? Jim Mc Allister

As far as I know, the only limitation is the imposed by the file system. A USB thumb drive, memory card or phone is likely to use FAT16, the "file allocation table" system from Microsoft's old DOS disk operating system. This can store a maximum of 512 files in the root directory -- and this assumed 8-character file names! If the card is 512MB or larger, it probably uses Windows 95's FAT32 file system, which has no such limit. Since using 8.3 filenames (eg Track001.mp3) is probably impractical, you may need to store FAT16 files in separate folders.

Footnote:FAT32 was introduced with Windows 95 release 2.

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