Thank you for viewing. This is a set of 4 memory sticks, suitable for use with PSPs and other devices. Below are the descriptions for each of the 4 memory sticks. SanDisk (Black) EXtreme III Memory Stick PRO-HG Duo (Capacity 8GB) ↑ This is a SanDisk EXtreme III, and the specification is Memory Stick PRO-HG Duo, so I think it's fast. SanDisk (Clear Blue, see-through skeleton color) Memory Stick PRO Duo (Capacity 2GB) ↑ This is a nostalgic skeleton body. Lexar (Black) Memory Stick PRO Duo MARK2 (Capacity 8GB) Lexar (Black) Memory Stick PRO Duo MARK2 (Capacity 2GB) All are MagicGate compatible. I have completely formatted them by writing 0s on a Windows PC, and then formatted them again in FAT32 or FAT format on the PC to ensure they are recognized when inserted into a PSP or similar device. Basically, individual sales are not possible. I would appreciate it if those who understand that these are used items that were used by an individual would purchase them. The environment is free of pets and tobacco. I will ship as quickly as possible. Thank you very much.