Hi ! I recently bought a macbook and i'm in love with it, for christmas i'm looking to buy myself an external hard drive , between 120 gb and 160 gb, but i have no clue which one to buy ... ! I was looking at this model : http://www.wdc.com/en/products/products.asp?driveid=262&language=en which holds 160 gbs, but i also realised that this hard drive could not work by itself on my laptop as it needs an external power supply.... ( WHICH I DO NOT WANT!!!) My criterias for this hard drive are : Portable and lightweight ( no extra cables, or power supplies) Between 120 gb and 160gb And something that will last me at least a couple of years if i use it normally. It also needs to be compatible with Mac OS 10.4/.5 and Xp/Vista..! So if you guys have any ideas, brands, or whatever , don't be shy! Thank you!