eSATA is probably the best bet. For my Desktop, I added an external SATA port that's plugged into my Motherboard and works as fast as any internal HD. For my Laptop, I had to buy a PCMCIA or Express Card that has a couple of SATA jacks (there are also some also that have a combination of SATA and USB 2 --if you still want to go the USB route but don't want to take up your existing USB plugs...). The eSATA is really fast to copy anyting on.. the USB 2.0 takes way too long to transfer files.

Here's a HD example
http://www.memoryexpress.com/Products/PID-MX23831(ME).aspx

eSATA port for your PC...
http://www.memoryexpress.com/Products/PID-MX16430(ME).aspx or
http://www.memoryexpress.com/Products/PID-MX25341(ME).aspx

PCMCIA Adapter for eSATA for your laptop
http://www.memoryexpress.com/Products/PID-MX23795(ME).aspx

ExpressCard Adapter...
http://www.memoryexpress.com/Products/PID-MX18028(ME).aspx


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