Definition
The .PSU file extension is used for Playstation 2 saved games created using the EMS PS2 Memory Adapter. The adapter makes Playstation memory cards compatible with PC computers.
Use
Using the EMS PS2 Memory Adapter and the .PSU file extension, saved game files can be stored on a computer's hard drive, allowing for more files to be stored than possible on a single memory card.
Related Extensions
File extensions related to .PSU include .PSV for Playstation 2 game files saved on a Playstation 3 and .PS2 for games saved using the PCXS2 emulator.