How do i reset the Coby MP-C781 MP3 Player. if i cant my problem is i can't see the menu choices after i pick nav or sys and a hidden file called found.0000, found.0001, found.0002 please help me

It sounds like the Coby operating system is corrupted.

I'm going to recommend you try the following procedure with one catch; I'm assuming you can turn the unit on and at least get a menu. If not this procedure isn't going to work.

NOTE: The following procedure will erase everything on your Coby so be aware!

Essentially, we're going to reformat the unit using Coby's own format routine.

1. Power Unit On
2. Scroll through your main menu going to your right. From "Music" ---> to "Settings"
3. Under "Settings" you will have another menu. Look at the bottom choice called "Sys Tools"
4. Select "Sys Tools" and you will have a series of options, choose the second option "Format"
5. Select "Format" and follow the prompts
6. Wait for the routine to complete
7. Power unit down
8. Power unit back up and reconnect to PC
9. Use Windows Explorer or My Computer to see if the unit is recognized, and it should be at this point.
10. You should be set

For some reason, the operating system for the Coby gets corrupted and this is the only way I know to fix it short of sending the unit in for repair, which isn't an option really. (Cheaper to buy a new one)

Hope this helps you or anyone else that has unexplainable problems connecting to the Coby MP-610 / MP-620.

Please Try these steps to fix your Coby MP-610 MP3 Player.

what I would do is plug it back to the computer and if that works what you should do is go to the manufactures website and download new firmware for your player and reflash the player and try draging a dropping the music instead of using windows media player. this is how you can drag and drop:
first off find where your music is stored and open up that window then open up a window with you mp3 player in it and drag and drop the music into the window with your mp3 player

may be thers to many data

I can help you with you Coby 610 mp3 player.

Replacing the firmware in your mp3 player will correct your 'file sys err' message and have it working like new again.

Please try these steps to fix your Coby MP-610 MP3 Player.

I hope that helps.
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Unfreeze Coby 610

http://http.vitalstreamcdn.com/cobyelectronics_vitalstream_com/software/MP610_Firmware.zip

Download that. It contains a firmware update that is meant to fix the "file sys err" problem. I got it directly from the Coby website and it works perfectly.

not responding the coby mp3 550-1g player on my computer

the file system seems to be damaged ... format and reload ... and if possible upgrade the player software

this guy needs to be barred for life!!!

Take the battery out for a couple of days. Then, it should reset.