Maybe it's a stupid question, but is there any way to install/put/use a second floppy unit on your MSX and try to do the backup on it?

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Has anyone here ever tried to make a backup of Jesus (disk 1)? I can make copies of disk 2 & 3 but the first disk is giving me all the errors. Same goes for disk 2 on Aleste 2. As I said before these games work without problem in my MSX2+ so the original disks can't be damaged.

I did the complete backup of original Jesus time ago (with a normal PC diskdrive). It was done by using copia720 with /! option. It seems like your computer is weird.

Do you have a HD with your MSX? You could use copy720 (or other MSX disk copiers as FDSAVE) there to get a DSK of the file.

Good luck with it!