If you are converting say a 700mb avi file, after converting to dvd I find it usually is about 4gb. So if your hd is full there is no way you can accomplish this. You could go get an external hdd and dn/ld, convert and burn from there. I have a 60gb portable that I use for back-ups. I have a 250gb for this kind of stuff. The 60gb was only about 60.0****. You could always dn/ld, convert, and burn and then delete after burning. Hope this helps.