When you are on the go, you need to be as light as possible and only the most important of the peripherals will make the trip with you. Now, if you have one of these small footprint hardrives, you won't mind them tagging along and with the piece of mind of having up to 1TB of space at your disposal.
LaCie Rikiki Portable Hardrive
The chassis is just a rectangle extruded from aluminum and anodized black, but the sharp edges and brushed "grain" give it more character than anything you can mold out of plastic. An inconspicuous LED indicator light and USB jack are the only mars on an otherwise smooth case, besides the subtle LaCie embossing on each plastic end cap. At 4.3 inches long, 2.9 wide and half an inch thick, the Rikiki lives up to its name: It's skinnier than Western Digital's My Passport Elite, a full inch shorter than Iomega's eGo, and beats Seagate's Free Agent Go by the same measure. Unless you want to go solid state, you really can't get much smaller.
FreeAgent GoFlex Ultra-portable Drive
These drives are made to be ultra portable (as seen in their name). They have USB 2.0 connectivity, that includes the plug and play feature. They come with a free and easy to use backup software, so you can backup your files. You also are able to upgrade to a better and faster connectivity – USB 3.0, FireWire 800 or eSATA. Throught a special adapter you can also connect to your TV. The Seagate FreeAgent GoFlex Ultra-portable drives are available in four capacities – 320GB (STAA320100), 500GB (STAA500100), 750GB (STAA750100), and 1TB (STAA1000100). There are also different colors, but the primary one is black.
WD My Passport
If you're fast running out of room on your Mac and want to avoid the inevitable slowing down of your machine as you ply it with yet more files, you need the Western Digital My Passport for Mac Portable Hard Drive. At a generous 320GB, this sleek, affordable external hard drive has enough space on it for up to 64,000 digital photos, 80,000 mp3 songs, 8,000 uncompressed CD-quality songs, 24 hours of Digital Video, 120 hours of DVD-quality video or up to 38 hours of HD video. Super simple to use, just plug the WD My Passport for Mac Portable Hard Drive into a free USB port on your Mac and get storing; no need for additional power adaptors or messy cables.