Trouble with Two Hard Drives, One i'm using and one I wish to use.

[Keyblockor]

Hello Facepunch, I come to you with a problem involving two harddrives. I have recently went to Futureshop this christmas and have bought myself a computer this christmas that plays videogames.

Computer - [URL]http://www.futureshop.ca/en-CA/product/gateway-gateway-intel-core-i7-2600-computer-fx6860-ef30p-fx6860-ef30p/10181254.aspx?path=57dde6fe945b94c0eb50d5015e28577cen02[/URL]

Not knowing alot about computers, my dilemma was found when I saw two harddrives
[IMG]http://i699.photobucket.com/albums/vv353/keyblockor/HardDrives.png[/IMG]

The I am using is the one shown, Gateway (C:) which is currently inferior to the one I wish to use, the Data (D:) one that has 1.8 TB in it, I wish to switch from Gateway (C:) to Data (D:)
[IMG]http://i699.photobucket.com/albums/vv353/keyblockor/HardDriveIwanttouse.png[/IMG]

I am currently stumped, how do I do this, facepunch? am I able to go into BIOS and switch boot order, do I have to take them out? I know that Gateway (C:) is in the master drive and Data (D:) is in the slave drive.

[editline]30th December 2011[/editline]

EDIT : Nevermind guys, turns out they're both connected to each other so i'm able to run things stored in DATA (D:) on my Gateway (C:) drive.

Sorry for taking your time.

[moesislack]

The c drive is an ssd you can install things directly to the d drive if you want.
I personally have a drive dedicated to just steam.