If you don't have a wireless network but want one, consider Apple's ( Macworld rated 4 out of 5 mice ), which combines the speedy 802.11n Wi-Fi base station capabilities of an AirPort Extreme with the mass storage capabilities of an external hard drive. Additionally, Time Capsule is Time Machine-compatible, so all OS X Leopard users on your network can take advantage of automated backups without having to connect a drive.

[Writer, music composer, photographer, and pack rat Kris Fong has archived tens of thousands of files. Now if she could only remember what's stored where...]