For the people with a more "purist" approach on their PSP's storage solutions, these are the best Memory Sticks that you can possibly get. : r/PSP
Amazon.com: USB 3.0 SD Card Reader, Rocketek 2 Slots Memory Card Reader with a Build-in Micro SD Card Cap for SDXC/SDHC/UHS-I SD Cards, TF/Micro SD Cards Reader - Take It as a