I have a number of media files (avi, mp4) which are working properly and can be played on my PC. (Windows 8)
However when I copy the files to a flash drive (exFAT, fresh formatted) just a few can be played. For the others I get "Unknown codec or broken file"
MD5 of the files on hard disk and on flash drive are equal so it shouldn't be a broken file. It shouldn't be a codec problem as I can play the file located on the hard drive.
What could be the problem and how can I fix it?
UPD: I have to recheck about MD5. Just rechecked one and MD5 was different. It can lead to another question - how can the file copied to flash drive have different MD5...