Utorrent problem with too little disk space?

when i try to download a 700mb movie using utorrent im told there is not enough disk space. what does this mean and how do i fix it

Anonymous2009-09-01T18:21:08Z

It means that you have less than 700MB of free space on your hard drive. Delete some files. (With such a small amount of free space, your computer is going to crash hard one of these days - then you'll be unable to start it. You want a MINIMUM of 8GB free at all times.)

gpocalypse2009-09-01T18:20:03Z

If you don't know the answer to this question, you really REALLY shouldn't be downloading torrents. This is for the sake of your computer and a lot of grief on your part.