That file has it's good side and it's not so good side.

The good side you've mentioned. The not so good side is that you wouldn't be able to, say, start a dozen downloads totalling three times your current disk space with the knowledge that some will finish faster and give you time to move them to a seperate disk.

As a counter-point to that argument, seperate download folders could be made avaliable for each file "type" (audo, video, program, etc) so that all your ISO downloads are put on your 80 gig HDD while all of your e-book downloads are stored on your old 20 gig.

For this to occur a user would either 1) Have the ability to specify the file "type" for each added extension and be able to create their own custom "types", or 2) have all new extensions be automatically put in a type like "user added types"