...I think it was my fault...
I was thinking, that retropie shows me the usb files, when i plug in the stick...
But it look like, it shows alltime the files on the sd card ;-)
...so I have created a folder "retropie-mount" on the usb stick, let retropie copy all roms to it, and after that I deleted any files in "\retropie\roms"
Look like this solve my issue.
I think now I understand the differents between the directory "retropie" and "retropie-mount"
...if I want to import roms to the sd card, i put the files on the usb stick to "retropie" and if I like to use a external usb stick as storage for the roms, I use the "retropie-mount" directory on the usb stick...
Is this right?
