The PS3 cannot natively run "folder-style" (BLES/BLUS) backups on OFW. You must convert them first. Download and run the CFW2OFW Helper . Drag your game folder onto the CFW2OFW Helper.exe .
The tool will automatically download necessary updates and create a new folder compatible with OFW. Note: Not all games are compatible with this method. How to Inject PS3 games on OFW 4.81/4.88
Place your PS3's exported backup (found at X:\PS3\EXPORT\BACKUP\ ) into the \backup\ folder of TrueAncestor. Open retailer.exe : Select your backup folder (Option 1). Choose to add your game (Option 3). How to Inject PS3 games on OFW 4.81/4.88