50gb sounds about right for your operating system plus all your misc files. One thing you can do to clear up space is by running a tool like CCleaner, which will remove all your unneeded temp files and such. See if that helps.
You have a solid state drive (The crucial), and a hard drive (the Seagate). They are both storage devices, but here's what you need to know:
Everything on the Crucial runs really really fast. So you should install all your programs on it. It only has 64gb, so you can't put all your movies and stuff on it.
The Seagate is your hard drive. It's 1tb, which is 1024gb. It can hold a lot, so put all your text files, pictures, movies, etc on it.
Thank's for the epic fast reply, and thank's as-well,
Okay one quick question then i think i should be right, how/where do i go about finding both of them on my computer, i mean the 64gb is almost out, (which has all my games/such) on it, but where is the 1TB ?