The biggest hard drive hogs would be videos in both the .VOB or MPEG formats.
Usually music files saved as MP3 or MP4 do not take up that much hard drive space.
Since we are obviously not speaking about a RAID array with SATA hard drives and you were asking if you could take two separate hard drives of lets assume each was 300 GB and make them one drive of 600 GB, your system will recognize both drives as being separate hard drives and assign different drive letters.
Raid array is usually set up so each hard drive is a mirror image of the first hard drive, the one your boot sector is located on.
If hard drive number 1 loses any data for any unforeseen reason, hard drive 2 will have a back up copy of the lost file.
You should if anything have your largest hard drive or partition set up as your primary drive, then save your files you do not use often to the smaller partition or smaller hard drive.
Now in my case I have Nero 9 and Roxio's VHS TO DVD, I make a lot of videos from home recorded VHS tapes to DVD .VOB format and a few to MP4 format, I have recorded 100's of Vinyl 33 1/3 and 45 RPM records using Roxio's Sound Editor onto my computer, I have a 500 GB Seagate and have scarcely used 175 GB at any given time.
Now that is not including the other 200 programs I have and the computer video games I play to which I always save the game files to my hard drive rather then they solely being used off of the mandatory 'in drive' game disk.
So when you save the game files to hard drive, that to takes a up quite a bit of hard drive space, but again, I have never been past 175 GB with all that stuff I have installed.
Perhaps you could remove some programs that you do not use often that are just taking up badly needed space.
I for one, have tons of programs installed I never use, but hey, I'm not low on disk space, so I don't worry too much.
In fact I just checked my un-install program list and it states I have 188 programs installed, how many do you think I actually use in a months time? Probably 8, so that means I have 180 rarely used programs on my hard drive.
You would laugh if you seen my desktop shortcut icon clutter at times I have 200 icons setting there on my desktop.
If you want the desk space, try removing the programs you serious use the least.
Edited by MrBruce1959, 27 June 2011 - 06:03 PM.