(often referred to as USBUtil 2.1 Ultimate ) is a specialized Windows utility used primarily for managing and preparing PlayStation 2 (PS2) game libraries to be played from USB drives. It is a critical tool for users of Free McBoot (FMCB) and Open PS2 Loader (OPL) who rely on FAT32-formatted storage. Key Features of USBUtil 2.1

Your USB drive appears in Disk Management, but the file system shows as "RAW." Windows asks you to format it, but the format fails. This indicates a corrupted partition table or damaged master boot record (MBR). Version 21’s exclusive write-zero mode can scrub the first 1,024 sectors, forcing the OS to re-initialize the partition table cleanly.