I experienced this same problem (device freeze-up) with my Clip Sport within a few days after my purchase.
I was attempting to play an album I purchased several years ago from iTunes.
These songs were “m4p” files with embedded DRM (digital rights management).
I forgot these files could only be played within my iTunes software or by Apple gadgets that I signed in with my iTunes account.
I think the Clip Sport and Clip Jam do not like music files with embedded “DRM”.
Anyone else have freeze-up stories to share???
