If you have a "Fat" PS2 with a Network Adapter and an internal SATA drive, the system traditionally uses the APA partition scheme. This requires specialized tools like WinHIIP or HDLoader , though modern users prefer HDL Batch Installer . The Setup Workflow

October 2023 (Updated for modern OPL versions) Subject: Correct folder hierarchy and file placement for Open PS2 Loader (OPL) on Matrix-based memory cards.