Local disk C: full, I want to save to my other drive E:

Hello, My HP 15 Notebook PC had a problem with something, and it was fixed. But after the fix the Local Disk C only had 97GB but my other hard drive local disk E had 500GB and I want to my downloads, files and other stuff to be save the automatically because my C space has less space and it always saves the everytime I download a software or songs. And it has the Windows 8 logo on the C drive, how do I make my E drive as my Local Disk E and save my stuff there instead of saving it to C?