However, many advanced users install WebMAN MOD (for automatic fan control and memory efficiency) and multiMAN (for heavy file management). They complement each other perfectly.
MultiMAN allows users to copy retail game discs directly to the PS3’s internal Hard Disk Drive (HDD) or an external USB storage device. Once backed up, games can be launched digitally, eliminating the need to swap physical discs and preserving the console’s optical laser. 2. Robust File Management
Once backups are in the correct format, you can select them within multiMAN to mount them, making them appear as a disc on the XMB, ready to play. Why Every Jailbroken PS3 Needs multiMAN
The PKG file was not completely downloaded, or your USB drive has errors. Fix: Re-download the PKG from a different source. Then, reformat your USB drive to FAT32 (or try a different USB port—Port 0 works best).
One of the biggest points of confusion for new users is the difference between "Folder" (JB) format and PKG format for games.