I'm using a USB drive with Comgenie's Awesome Filemanager. Just run that pkg then copy the files over via a usb drive. You could also try your luck with the FTP which I should have done, but good luck!
First get a Backupmager I would try MultiMAN it is most complex but solves most problems !
Second Copy games to usb and use the right directory eg. GAMEZ(or OHMAN12123)\BLES00xxx\etc.
Second for Multiman press R1 and activate USB Patch (gray right upper coner)
Chose game and press O to copy to internal HDD
You could also use an FTP guides are all over the board , but with multiMAN always activate USB patch first it helps a lot ^^