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Hi. Tried doing this twice but it is still not recognised. www suggesting I have lost End of file, so quicktime wont play it, but how do I get a whole working copy? Copied several files, half copied fine and work, half dont. Thanks ever so much.
MacBook Air 13″, macOS 10.13
Are both USB flash drives using the same file system (disk format)?
FAT-32 has a 4 GB file size limit, meaning e.g. a 5 GB file wouldn’t be copied in its totality.
Use exFAT instead, if you want wide compatibility.
Use Mac OS Extended (HFS+) if you only need compatibility with Macs.
Use APFS if you only need compatibility with newer Macs (High Sierra or later).
File system formats available in Disk Utility on Mac - Apple Support
Are both USB flash drives using the same file system (disk format)?
FAT-32 has a 4 GB file size limit, meaning e.g. a 5 GB file wouldn’t be copied in its totality.
Use exFAT instead, if you want wide compatibility.
Use Mac OS Extended (HFS+) if you only need compatibility with Macs.
Use APFS if you only need compatibility with newer Macs (High Sierra or later).
File system formats available in Disk Utility on Mac - Apple Support
Copied .mov files from one USB to another. Plays fine on the original, wont play on copy.
