Review on Versatile Memory Stick Pro Duo Adapter for Sony PSP, Camera, Handycam & More! by Rob Dixon

The bottom line is that it lets you use a microSD card in something like a Sony PSP. On my PSP 2001 with a 32GB Adata card, it formats the card but then gives a format error. The card is actually formatted and the right size, but it doesn't have a folder structure, so I had to copy it from another card to my computer. After that everything works fine. This is an inexpensive way to increase storage space for your PSP.