Dears "The C" and "Ionewolf7" thanks you very much for yous advices, but until now it have been unfruitful. I have proved a lot of Data recovery programs: TestDisk, Wondershare, 7Data-recovery-suite, Recuva, drw-free, Restoration, Freeundelete... The best results were obtained by ADRC, because it detected the G drive and dictaminate that it is unable to open the disk boot sector. This sector have an utility for write a new boot sector for the pen drive, but I am afraid to use it without a deep knowledge; this migth be the last solution. Perhaps is a better solution to run the instalation software of the v165w for the pendrive, but I don't have it; do you? In the HP page I didn't find.