I'm not as tech savvy as any of you so bare with me. I have a Bufalo 250GB external usb hd. I use it to backup two computers. One computer it works great. The other..it shows me a lower capacity than the HD actually has and consequently I cannot load large files to it. It says the HD is only 76GB, when it is 250GB. I am running XP on both computers. any ideas. Not sure if it is relevant, but I have been trying to uninstall Norton SYstemworks...but to no avail. Thanks for any help.