Question about the Multiple drive feature?

[TotalHavoc]

I'm confused about this:

Provides the ability to download parts of a post to one drive and have them assembled to another. Useful if you want to minimize I/O bottlenecks by downloading to a fast internal drive then save the assembled files on larger external media like a NAS.

How is this any different then what I already have by having the data folder on one drive and my download folder set to another? Am I missing something or a setting somewhere? Just plain confused

Havoc

[Quade]

You can download to a drive and have it unrar to another. Pretty sure that's what it's talking about.