I didn't configure the hd myself, I'm using a pre-prepared image with games and all made by the guy who sold me the SIDE2 both on real 800xl and Altirra...I'm very, very ignorant Anyway, I never had any problems moving stuff from the pc to the atari, just copy new material from the pc to the CF, insert the CF in SIDE2 and run... Hope that's what you mean...Have you got a pre-prepared image which will allow me to launch UFLASH from the SDX prompt? I haven't understood why UFLASH can't see the firmware roms on real machine... It works on emulator with the last bios... I must update the firmware!