Spawn_20240
What version of the MP3 Player Utilities are you using?
I've found sometimes I get this problem too. I just have to keep retrying. Best thing to do is once you open the upgrade tool, WAIT for a minute to make sure it doesn't 'drop' the device again then do the upgrade. Try not to do the upgrade too quickly otherwise it might drop out during the firmware upgrade which could cause you more problems.
Also try restarting your computer as well in case it's a Windows thing.
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Let me know the result.