The greatest amount of storage is offered by external rotating disk drives. Most use USB2 or Firewire (IEEE 1394A/B) interfaces. Drives can also be installed in hot- (swap when running) or cold- (power-down to remove or insert) swap mounts, which allow you to remove the entire drive from the computer for storage. However, all rotating disk drives are somewhat liable to failure. They may have a much greater MTBF (mean time between failure) than they did a decade ago, but they are still fragile. You can reduce wear and tear on the archive drive by turning it off when you don't need it.
In conjunction with the rotating disk drive or in place of it, use a DVD recorder. These can store 4.7GB (single-layer) or 9.4GB (dual-layer) of data. Since optical disks deteriorate over time, you should always make *two* verified copies of the image data before removing the image files from your hard drive. Always store the disks safely in their cases and place them somewhere where they are unlikely to be damaged (e.g., closet shelf, cupboard).
The quality of optical media varies widely. In general, the more you spend, the better the disk; avoid budget or discount brands. When you record the data, use the slowest available recording speed and use the recording software to verify the disk contents afterwards. If the software does not have a verify option, copy the contents of the DVD to your hard drive to ensure the data can be read and check a few files at random, before deleting them. This reduces the possibility of errors and can produce disks that last for ten years or more, instead of one. DVD recorders for computers are generally made as cheaply as possible and their quality and longevity also varies widely. When the technology exists and you can afford it, switch to Blu-Ray, because it has a much larger storage capacity.
You should verify that you can read the optical disks you have created at least once a year. If a disk fails, make a new one from the remaining copy immediately (you made two, remember?).
Footnote: one other answer suggested using an on-line storage. This is inadequate for more than a few small files. You should also check the fine print in the terms of use agreement, since you may find that your images have entered the public domain by storing them in the 'free' archive or have become the property of the company running the site, in which case they could profit by selling them.
Comments
That's what I do burn photos to CD. After copying to CD I reduce size to keep them handy on PC.
by Alatea on April 18th, 2006
Home-burned cd's rot over time. So you should make a new copy of them probably every five years or so. If you wait longer, the data on the cd might become unreadable.
by sndrspk on August 26th, 2006