Copied from another thread. i thought it'd be appropriate here, too, since the other one can move fast at times:
Hey, guys, friend bought Saints and asked me if I could help him figure something out, but it's beyond me. Is he screwed because there's no answer? His last resort is just uninstalling stuff.
"Again, in summary, my computer's HDD is broken into three sections: C drive (440 GB), SDATA1 (232 GB) and SDATA2 (232 GB). C Drive is now full. I want to install and play Saints. How do I get it to install to the available space on the other drives? And will Steam know to look to each respective drive when pulling a given game? Ideally, I'll be able to toggle some switch, download Saints, and no matter what game I play, no matter where the game is located, it'll find it on the appropriate HDD and boot it up."
Is that even possible? Any help would be great.