I have a player looks exactly the same as this one (From a Hong Kong guy via eBay). It was sold as a 4GB player, but it's actually a 2GB player. I think the one you have is also hackered.
I trid to update the firmware without backup, I failed, the player is dead now. I know all the procedures to repair the firmware, but I can't find the correct version. I remember its original version is 3.5.37. I trid all the 3.5.37 version firmwares download from this website, but none of them worked. (Each time I trid a full 3.5.37 version then another selected firmware).
If you have the same player can you please extract the firmware and email to me at
fangjun@gmail.com
I really appreciate your kind help.