Enter the flash drive. Just plug it into your USB port, and you've instantly got gigabytes of rewritable storage at your fingertips.
The range varies in price, capacity and other features. Here's what to keep an eye out for:
Keychain
This tiny little flash drive fits easily in your pocket or on your keychain, and carries a smaller capacity. You can easily find versions for under $40, if not less. But be sure to get at least 2 GBs worth of storage. Anything less would be uncivilized.
Portable Hard Drive
For extra big storage, check out a portable hard drive. 80 GBs should be a good size, and you can find them for under $100 (on sale, of course).
External Hard Drive
If you need enough storage to park an ark, something north of 200 GBs should do. Typically, bigger hard drives need their own power source, so consider that as well. As far as price goes, don't settle for less than 1 GB per dollar.
It certainly beats the alternative.