Memory Stick, A later version is the Memory Stick Pro and Memory Stick Pro Duo.
Your digital camera's memory card will only work in a PSP if it is a Memory Stick Pro Duo adapter.
It depends on what kind of info you mean, to record a voice or noise use a voice recorder but if you want to store computer info use a usb memory stick.
There are several types of memory sticks which to choose from. All cameras need a memory stick in order to store memory, so it is very well needed.
Memory Stick Pro
How many pictures can a 4.0GB memory stick hold on a 12.0 mega pixel digital camera?
Memory stick PRO Duo with Adapter
It's the memory card (sometimes called memory stick) that's used to hold the image files.
Compact Flash, Secure Digital (SD), and Memory Stick are all types of flash memory storage devices. They are used for storing digital data in cameras, smartphones, and other electronic devices. These memory cards provide portable and removable storage solutions, allowing users to transfer and store data easily.
If the question is about the RAM memory sticks then it needs 200 pin SODIMM DDR2. For other memory types it has a card reader slot also for Flash memory which accepts Secure Digital, MultiMedia, Memory Stick, Memory Stick PRO, xD Picture Card. - Neeraj Sharma
Produced by Sony, it is used for Sony digital cameras, digital music players, PDA's and the like.
Usually any camera store or currys, argos, comet etc.