Cut and paste.
Or hold either Shift or CTRL down when dragging. Not sure which, but you can experiment.
I've added an extra internal hard drive(H), which is up and functioning well. Here's the problem - currently, if I drag the file from my desktop onto my new drive (H drive) the file is copied onto H but remains on my desktop and I have to delete it manually. How do I make it so the file will be deleted automatically when I drag it onto H?
I'm using XP Pro on a Dell Dimension 2400.