I have been using my Clip Zip very little, and mainly just playing one guided meditation. Today I encountered a read error in that file. Rewriting the file via dd conv=notrunc made it readable. Trying to copy all of the 3.6 GB on there to my hard drive to check readability failed about halfway through, with a file I certainly didn't play often. I'm surprised to see such unreliability with flash storage. Have others encountered similar problems?
Also, after one of these read errors, the device becomes unusable, generally leading to a panic and shutdown after which I need to long press the power button to reset, and then short press it after hearing a click in the headphones to turn the device back on.