If you wane to add more storage space to your computer, you've got two choices: either open it up and replace the internal hard drive, or plug in an external hard drive.

It's not quite as simple as that, though--if you bought your PC from a big manufacturer, for instance, installing a new hard drive may well invalidate your warranty, but if you've got a laptop you might even be able to change the hard drive.

While you're thinking about a new disk, you might also want to consider some of the new options you have today--like hard drives that connect directly to your TV for watching movies, or doing away with physical connections altogether and going wireless.

	Budget Buyer: Western Digital Caviar Blue SE 16 640 GB   This is a truly excellent internal hard drive, and Western Digital has successfully paired quiet running with powerful performance.	Find the best price

	Simplicity First: Western Digital My Book Studio Edition 500 GB   This hard drive has all the connectivity options you'll need to use it with a PC or a Mac: USB, FireWire 400 and 800, eSATA), as well as a very handy guage that gives you a quick idea of how full it is.	Amazon Marketplace UK 95.00 Compare prices

	Demanding User: Seagate Barracuda 7200.11 1.5 TB   Hot news right now, this new drive is the very first to have one and a half terabytes on board.  As competition is still on the ground, you'll pay quite a lot for all those juicy gigabytes.	Pixmania.co.uk 82.90 Amazon.co.uk 83.52 E-buyer 83.52 dabs.com 84.99 Shop BT 84.99 Misco UK 89.99 Compare prices

	On The Go: Memup Kwest Evolution 2.5 250 GB   If you've already got an eSATA port on your computer, then the 2.5'' version of the Kwest Memup Evolution is a great choice. As well as excellent speeds, you'll get a nice neat black box that doesn't take up too much space.	Find the best price

	Expert: Western Digital VelociRaptor 300 GB   If you're looking for a super-fast hard drive, you need look no further: this is the model you need. You might want to be careful with your wallet though, as it doesn't come cheap ...	Amazon Marketplace UK 182.95 OYYY 193.45 Pixmania.co.uk 199.90 Compare prices

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