I have had issues moving Projects created on newer OSes over to older one's via USB flash stick and have the OS refuse to load the file, claims to have CRC errors.
But the same file will work on the newer OS, even from the USB stick .. That tells me the file format may have an issue.
I did this with W2k one, an OLD file that should work on W2k would not execute when taking from a flash storage done by a newer OS.