There are a couple of different options for storage. When we went it was cheaper to get a storage device than enough memmory cards. That way we could also verify the pictures before reformating the memory card.

We used a Flashtrax storage device. It uses compact flash cards from the camera and the unit transfer the pictures directly. Ours has a 30 gig hard drive and a lcd screen to review the pictures. Works off of battery (rechargealbe) and or course electric plug. It is a little bigger than a pda.

There are other options also availble.