I have read multiple posts regarding destination drives and problems with them. However, i have yet to read HOW to change your destination drive. I have a 2.4 ghz Pent 4 but the hd is almost full. I purchased an external 300 g hd
and when I attempt to burn a dvd movie it says well " Destination drive not enough space "

Thank you

Are you trying to burn to a DVD in your burner? What kind of disc do your have in the burner? How long in time is the video you are trying to burn? What program from the EMC 8 suite are you using to burn the video?
You left out a lot of information in your post that would allow someone to help you.

In addition to what Walt said, you should be aware that rendering a video clip requires at least double the size of the output as it stores the data in \windows\temp before finalising.

Shift as much of your data to the second drive and then try again. You NEED that amount of free space in the temp folder

I'll add my comment. Get a huge internal hard drive, image your existing drive, pull it out, put the new large hard drive in, connect your old drive, as a slave, and use the image from the old drive to copy to your new drive.

I am attempting to burn a video onto a dvd via burner.. ( Sony ). I am using roxio easy suite 8 and then My DVD express.

I cannot install a new HD as this is a work computer I am speaking about. It has A LOT of crap ( Important data and programs ) on the C drive. Thus needing the X drive which is the 300 + gig.

The video is about 40 minutes in length.

That size video should be able to fit on a 4.7 GB DVD. The 'Destination drive not enough space' message when you're trying to burn to a DVD usually means that the program isn't getting the right message about the size of the DVD in the DVD burner. An external drive isn't going to help that. Usually there needs to be a software/firmware update to solve that problem.

If you want to burn to the external drive rather than the DVD, you need to be burning to a Folder Set on the external drive and DESELECT burn to DVD. If you don't deselect that option, the program will attempt to burn to the DVD AND a Folder Set and you'll get the error message every time.

Try this - move the data onto the external to free up space, do the rendering and then move it back.

So long as you recall the folder it came from, there shouldn't be a problem.

As it's a work machine, suggest diplomatically to your boss that with the drive filling up, it's not very efficient (temp files and swap file are going to be cramped for space) and that it would be a lot better with a larger drive, purely for the sake of efficiency and productivity

One more thing......

You need to make certain that the file system on that external drive is NTFS. Many external drives come formatted at FAT and won't support files over 4 GB.