It's easy for digital images to accumulate to an unmanageable number, and storing and backing up images is often a concern.
External hard drives are relatively inexpensive and offer large amounts of storage space. They can be used to regularly back up not only your images but also your entire internal hard drive. These drives are offered in different configurations and amounts of storage space, including those that offer 1TB of space or more, such as Seagate, Maxtor, LaCie, My Book, and Iomega external drives. Archival media include recordable DVD-Rs (which can hold more than 4GB) and CDs (which can hold about 700MB).
Rewritable storage includes DVD-RWs (more expensive than DVD-Rs) and USB Flash drives (very handy when you're on the go).