The error you are receiving is a file system error and was caused by your previous format. Thing is - these players use a hacked FAT file system, and when you format it you turn it to the regular FAT file system, which has stricter limitations.
There are two solutions to your problem.
1) Format it in FAT32 and drop the music back in
2) Format it in FAT and create a folder in which you put the music, rather than just throwing every file in the root of the drive. The FAT file system is able to store only a certain number of files in the root directory (can't remember the exact number).
Either of these options should solve your problem.
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For my dreams i hold my life...
I miss my Meizu M6SL... Currently rocking a Sony Ericsson w595 on Samsung in-ear phones. Does fine, but it's not a chipod...
