If you want anything on a flash drive just boot up off the laptop hdd, if you want to move them to another hdd or just use both on the same pc your gunna need to go to the bios and select which hdd to boot off of first (del key or f2 key before windows start up to get to bios) can you please tell us what kind of computer you have? Ps: once you boot up off the other hdd you should be able to access the second computer files, they may be under windows os files on the hdd but you can move them to the other hdd also.