Not quite a Linux question but since I use Linux its related

Guys I have tons of mp3 music files that I wanted to play on a retro radio that plays MP3s. I bought it second hand off ebay but my data stick won’t play on it. The data stick is not faulty- it plays perfectly on my netbook.

The seller told me her data stick worked on it fine.

It plays CDs fine and it also has a working radio.

Have you any idea why my data stick does not play on it?