128GB Memory Stick PRO Duo TF 128 GB for PSP Sony H50 S40 T2 T25 T500

Memory stick is incredibly slow when it comes to the XMB menu on the psp however games run great. If I were to make a suggestion if you have custom firmware hit select on the psp menu and the PRO VHS MENU should show up. Set the CPU CLOCK XMB to 333/166, the CPU CLOCK to 333/166 and the UMD ISO MODE to M33 driver. That should hopefully make things run much faster however the XMB menu will still lag which is unfortunate but like I said games seem to run just fine. Its also slow because the default file system is exFAT where as on smaller memory sticks like the 32gig one FAT32 is the default file system which runs faster then exFAT.