jlandex , when the player is connected via USB, does its removable drive appear in My Computer?
If it does, perhaps try a format first using HP Format Tool here
http://www.mympxplayer.org/hp-format-tool-df466.html
Your player would very likely be using a Sunplus chipset. Recovery chances for this chipset is extremely low. i'll suggest you contact your seller for an exchange since you've just purchased it and should be covered under warranty.