O my god! I feel so stupid!
I just found the cause: I had to copy my files from my ipod since my external harddrive crashed.
While copying the files, the software I used didn't put the extension (for example .mp3) behind the filename!
You can close the topic, thank you very much for your help!
I just found the cause: I had to copy my files from my ipod since my external harddrive crashed.
While copying the files, the software I used didn't put the extension (for example .mp3) behind the filename!
You can close the topic, thank you very much for your help!