toshiba c855d laptop help

Here's a drive that reviews pretty good. A little bigger and a little faster.
WD Black 750 GB Mobile Hard Drive - 2.5", Sata 6 Gb/s, 7200RPM, - WD7500BPKX

Item#: WED-101766777 | Model#: WD7500BPKX

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=8516564&CatId=1277