The JDC31 uses SD cards. You should be able to find them at any department, electronics, or office supply store. You'll probably find them at most drugstores and supermarkets as well.
Make sure you get SD cards 2GB and smaller, not SDHC cards 4GB and larger. They look the same but SDHC cards will not work in the JDC31.
Answers & Comments
The JDC31 uses SD cards. You should be able to find them at any department, electronics, or office supply store. You'll probably find them at most drugstores and supermarkets as well.
Make sure you get SD cards 2GB and smaller, not SDHC cards 4GB and larger. They look the same but SDHC cards will not work in the JDC31.