Okay, i got it, i do not want to boot from it, only to save data on it, but when i try to format the disk in AA, i still got Error 130.
The 130XE see the disk for sure, because when i activate the 1050 before the computer, the XE is trying to boot from it.
Maybe my disks are incompatible with it?
I have a bunch of DD, but they are used for C64 and IBM PC. And i've read a description, that DD compatibility in the case of 1050 means another DD. A special Atari format.
Maybe i should get some SD floppies?