Oh, got it working!
But i am trying to write to PC DD floppy, but I always get an error at the end. Is it because of floppy size? I know that amiga floppy size is 880kb and PC DD is 720kb? Should I try an HD disk?
Nope. The disks are the same - there's no "Amiga" or "PC" floppy. They all are "1 MB " DD floppies; the difference is the file system written onto the floppy. MACs did btw 800 Kb AFAIR.