If you choose to use an external drive, format a USB flash drive or hard drive to the file system using an MBR (Master Boot Record) partition table. The PS3 operating system cannot natively read NTFS, exFAT, or GPT drive schemes. Installation Methods
This is the most ambiguous part. "1fc 25" does not correspond to a famous game title (like The Last of Us or Uncharted ) nor a standard firmware version (like 4.90). There are three prevailing theories among the modding community regarding what "1fc 25" means: 1fc 25 ps3pkg