moving games from internal to external hard drive

Every time i try to do this copy using multi man it gets a portion of the way through and then it gives an error. All my games are on my external and play from there except a few that I had to use ps3 splitter to get from my computer to external hard drive because some files were to large. I then had to copy them from my external hardrive to internal to merge the files through multi man but cannot recopy back the complete game to use off the external hardrive without getting an error.


Any help would be appreciated.