Same issue here. Could it be your MFAs are somehow corrupted?
So many corrupted files at same time sounds really worrying. Your hard drive could be failing and/or about to die.
Sometimes Clickteam are able to salvage data/assets from users corrupt .mfa files. But that's a longshot.
There are no errors in my hard disk. These files have been backed up to three hard disks at the same time. There is also a dvd-r. however, their file sizes have not changed, but they cannot be opened and cannot be loaded
Just a thought while looking at your badges - could these have been developed on Mac and you're now trying to open with Windows? I don't know that would make any difference though, but just a thought.
The file you posted just contains garbage, not even the MFA header nor anything that would show it's a MFA.
Out of curiosity, when did you save these files? And with what build of Fusion? (if you remember)
It has been many years. I want to take it out and have a look, but I find that such a problem cannot be opened. Multiple backups are the same error....
Weird... Could these files have been encrypted?