I did a bit of research on this, and you're going to have to be very careful. Your camera is only compatible with the very first generation of "memory stick". That sounds like a generic term, but it's actually a Sony specification. Please take a look at the wikipedia page on memory stick
, and note all the newer versions. Also note that the 'memory stick' is no longer manufactured. Here is a list of memory sizes, I agree that the Mb and Gb are confusing. Each one is double the size of the one before.
Now, you will have to find a genuine Sony "memory stick" and not the Pro, or Duo, or anything like that. When they were manufactured, the largest one was 128 Mb, so that is the limit for your camera. Anything in "Gb" or Gigabytes cannot be a memory stick
. I did find 128Mb memory sticks on Amazon
. The review page on DPreview
will tell you how many pictures you can store on a card half the size, just double it.