1. Memory stick PRO / PRO duo & can completely be used in any kind of digital camera, and the PDA, especially the PRO duo stick has high speed, of course can be used in PSP game player, nowdays digital cameras are widely used in the world, so this kind of memory stick has a great quantity. And its quality has proved to be excellent.

2. SD card:
1) Secure digital card.
2) Thickness: SD card thicker than MMC card
3) SD card is compatible with MMC card
4) SD card is high speed for read and write
5) Max. Read speed: Over 20Mbps
6) SD card is widely used for digital cameras, mobile phones, music players, PDAs, video DV "MMC.