Yo`re right
ops: . Its a Sigmatel device and I`ve read somewhere that Sigmatel devices are not compatible with Mp3 player utilities. It has its own software to deal with firmwares (Sigmatel MSCN Audio player-Firmware upload), but using it under XP I have always the same error message (Operating system reported error. The semaphore timeout period has expired).
It has an Hynix chip (HYNIX KDR HY27UV08AG5M TPCB 627A)
Thank you very much for your answers