Windows should automatically assign a drive letter (e.g., E: ) to your Memory Stick.

Windows 7 generally recognizes the PSP as a standard USB Mass Storage device without needing extra software. : Connect the PSP to your PC using a Mini-USB cable. On the PSP, go to Settings > USB Connection .

Before jumping into fixes, it is crucial to understand the incompatibility. The Sony PSP uses a proprietary USB communication protocol that relies on an old kernel-level driver ( usbscan.sys ). While Windows XP and Vista handled this easily, Windows 7 (especially post-Service Pack 1 and the 21H1 update) tightened driver signature enforcement and deprecated certain legacy USB classes.