Flash Memory Card Readers
USB card readers are a must have for anyone with a digital camera. They are very easy to connect to a computer and allow you to simply insert your memory card into the reader to upload photos. Memory card readers can read and write to the flash memory cards, enabling you to also upload data (such as music or pictures) to the memory card via the card reader.
Transferable Memory Cards
The memory card can be taken out of the card reader and put into a music player or portable video player. It is usually much faster to read a memory card via a dedicated card reader than it is to copy photos and music from a camera or MP3 player. You also won't be using any battery power while copying data, so it doesn't wear down the batteries on your camera/player.
Permanently Attached Readers
Having a memory card reader permanently attached to your computer is also handy if you have more than one device in the house that takes memory cards. Instead of connecting each device to the computer to upload/download data, you can use the flash card reader as the 'bridge' between your computer and your device.
Multi-slot Flash Memory Card Readers
There are many multi-slot flash memory card readers available, but always check before making a purchase that your model of memory card is supported by the card reader.