Hi Randolf,
Just to try to answer your questions:
1. I haven't heard of the radio only sounding on one side of the earphones before though that's a new issue for me. Just to rule it, can you try another set of earphones just in case? Generally the earphones have the antenna as part of the cord, so perhaps that's abit dodgy? Does sound weird. I know you said you can hear fine with music from the earphones, but if you can try some different set of earphones to see what happens, that would be interseting.
2. Formatting in FAT or FAT32 depends on the chipset of the players. Older chipsets only work with FAT while the newer ones work with FAT32. Try one and the other and see what happens. You can always format it back.
3. I would highly recommend AGAINST updating the firmware on your player. You only need to see the "Dead Players" section of the forum to see what I mean. You have a higher risk of a 'dead player' if you do by flashing it with an incompatible firmware.
Hope that helps.
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