Some custom OPL builds support exFAT, bypassing the 4GB split requirement. USBUtil v21 Ultimate can write directly to exFAT without splitting ISOs. Format your drive as exFAT (64KB clusters), enable “Large ISO Support” in USBUtil’s config, and then test Mode 2 Link. This reduces CPU overhead on the PS2 due to fewer file seeks.
The Sony PlayStation 2 utilized DVD-ROM media as its primary storage medium. As optical drives aged and media became scarce, the homebrew community turned to External USB Storage (ESATA/USB HDD) as a viable alternative. However, the PS2 console presents a significant hardware bottleneck: it utilizes the USB 1.1 standard, theoretically capped at 12 Mbit/s (1.5 MB/s), which is insufficient for streaming high-bandwidth DVD video or high-speed game data. usbutil v21 ultimate for ps2 usb mode 2 link
To address this, software such as Open PS2 Loader (OPL) and management tools like USBUtil v2.1 Ultimate were developed. USBUtil serves as the bridge between a Windows-based PC and the PS2, formatting and installing games in a file structure optimized for the console's limitations. Click Write to USB