When I try and copy a .blend file to a flash drive from my schools computer, the progress bar always stops about 3/4 of the way and then gives an error message. This only happens with .blend files that have the external data (textures) packed into the .blend. It happens on all flash drives that work perfectly fine for any other file including .blends without textures packed into it. I know the computers have Vista X32, one of the Intel quad core extreme editions, Nvidia quadro fx, 4 Gb of ram.
Is there a way to fix this? Is there a way to unpack the external data?