Split Games?!

i have encountered a problem whilst 'backing up' several games. when i back up from disc to external hdd it occasionally comes up with split game cannot boot from files. however if i copy it to my internal hdd it goes on without a problem, but when i go to copy from internal to external i get the same problem.
i have encountered this with:
God Of War Collection
Final Fantasy XIII
Medal Of Honor.
i am using P2Hub 2 on hermes v4, and have several manager programs including open manager 2.1I

any help would be great.

reformat your external hdd and try again... also make sure you have enough space on the device.

[Skelator03]

games with files over 4gb do not boot off ext copy to int