Never use your WBFS drive as your only backup. Store original ISO files on an external NTFS drive. Use USBUtil only to copy games to the playable drive.
Because USBUtil v3.00 is an open-source, community-developed homebrew tool, it does not have an official corporate website. It is frequently hosted on community forums and retro gaming archives. Step 1: Locate a Trusted Source usbutil v300 download install
Based on community guides, the general workflow for creating a playable PS2 USB game is as follows: Never use your WBFS drive as your only backup