I'm having the same problem. The music files play normally on the PC. I've tried transferring the files by using the sync method with both Media Monkey and Windows media player, and also manually copying the files to the SD card. The problem is only happening with files from 3 specific album downloads, but others from the same site are working normally. I've also tried re-downloading the problem music files (mp3) and the issue persists. I'm using a 64GB microSD card. The files are high bitrate (320kb), but so are other that are playing on the device normally. Just now I synced the problem files to the phone system storage and now they're playing normally. So I'll try reformatting the SD card and re-syncing all my music back to it and see what happens. Before re-formatting the microSD card, I thought I'd try deleting all the mp3 files and the entire folder and then re-sync my whole library. This resulted in many files simply not being copied to the card, so of course not showing up in the Poweramp library. It would hard to definitely show this, but has anyone heard of issues copying high bitrate mp3 files to a microSD card through WMP?