[NAME] In Windows 10 it is easy to specify another drive for additional storage. Go to All settings / System / Storage / click on "Change where new content is saved" / then change where new apps, new documents, new music, new photos, new movies, etc. are saved. Note that existing documents, music, photos, movies, etc. remain in their current locations and have to be moved (copied to the new locations and deleted (if you wish) from the old locations. Existing apps have to be uninstalled and reinstalled, except that some apps prefer to be installed on the OS drive. Also, some apps default to saving content on the C drive.
I own a Dell XPS 8930 running Windows 10 Pro. I have 2 drives:(1) 256 GB PCI x 4 SSD (C: drive)(2) 2TB 7200 rpm Hard Drive (My   drive) My C: drive is 97% full. Can I transfer files from my C: drive to My drive? My Mathematica software adds up to 15 GB+. Can I easily move these software packages from my C: drive to my drive? Is there a tutorial for folks in my situation?
XPS 8930, clear up space on C drive