I have a computer that has 3 hard drives in it. I bought it that way, its custom built. From the part numbers on them they are-http://www.newegg.com/Product/Product.aspx?Item=N82E16822148133-http://www.newegg.com/product/product.aspx?Item=N82E16822144013-http://www.newegg.com/Product/Product.aspx?Item=N82E16822145184. When I open My Computer, it shows local disk C: total size 132gb, local disk e: total size 101gb, and new volume Z: total size 698gb. Now thats nowhere near the amount it should be. I also have 3 os on here windows vista ultimate, which I know is on C, xp pro sp3, and windows 7 build 7k. I dont know how the hard drives are set up (ie raid etc, never done anything like that) or if there are partitions hidden etc. Like I said I have vista on C: and it is almost full, I would like to just remove xp anyhow so I was just going to move vista to the bigger hard drive, but I have no idea what Im doing when it comes to hard drives. Any help will be much appreciated. Thanks Cheverge.