A 500
 

Which utils can make a amiga 500 read/write on 720 formatted pc disk. I know i had some util on my amiga 1000, back those days...which worked great. But i don't t know which stil it was.

CrossDos, but for the old A500 I had, I used a program called (I think) disk2disk???
No, I think it was DOS2DOS actually.. (Memories..)
No promises, but when I google "dos2dos amiga download", the second link is a archive.org page that might have it.
(Could that be less helpful? Not at my Amiga.. sorry..)

https://en.wikipedia.org/wiki/CrossDOS

I think..

DOS2DOS (very old, probably what you had)
MessyDOS
CrossDOS (originally commercial but bundled with AmigaOS 2 and later)

I think there might be one more.

oke go look for the, also looking for the utils split and join, for both, amiga and pc, so i can split on amiga the big files, and put them together on pc side

looked at them, and i'm sure that i used another one, but don't know the name anymore

It must have taken you a lot of time and thought to come up with such a good thread title.

Yes for sure, still sick of the wasted time..:banghead:banghead