If you can, be sure to buy a camera that utilizes removable media such as a CompactFlash, Smartmedia or other PC card. A PC Card allows you to store photos on an external device and expand the memory of your camera so that it will hold more pictures.
Much like a floppy disk, the card is activated as the memory storage area of choice simply by inserting it into the card slot.
Two important issues in regard to PC cards:
1. These cards can be fairly expensive. Depending on how many megabytes of storage are on the card, it can cost a lot of money.
2. When a camera manufacturer invests in a PC card slot, it does not invest much in internal storage. This means that in order to get more than, say, 7-10 high-quality pictures in the camera at any one time, you need to buy an PC card up front and this adds to your initial cost.
There are many different PC card formats out there but the most popular seems to be CompactFlash. There are two types commonly used - the thin Type II flash RAM cards that most consumer level cameras use, and the thicker Type III mini hard drives that most high end cameras use. These Type III drives can be less expensive per megabyte but may also be more fragile since they do have moving parts, a spinning drive inside.
Whichever way you choose to store your images, both the internal memory in the camera and the memory in a card or drive store information in a way that allows you to free up more memory by erasing files; when you erase an image, regardless of where that file is on the memory space, you are rewarded with more space available for additional images.
For more information on Digital photography be sure to check out Photography by Lloydlee Heite at www.lloydlee.com.
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