An older camera, the DiMage A1 came with a 16mb card. Some cameras are picky about which cards work best. Compact Flash cards are sold in different speeds and your camera may work faster with a faster card. This camera can use Compact Flash type I or type II, and is compatible with the microdrive card. Since this camera was introduced the capacities of Compact Flash cards have increased dramatically so I believe you should be able to use a larger card with no problems but I would check out some of the online photography sites to read about other's experiences. Here is one good resource:
Hope this helps!