Hi
I have a 250 Gig SSD, internal drive, but I only put Windows, my swap file, and Windows related programs like CCleaner, Defraggler, anti malware, email client, browser (small stuff) etc on it.
My C:\ drive is about 73 Gigabytes total.
All my games and graphics software, film editing, programs and that sort of thing are on my D:\ drive (415 Gigabytes).
All my data, music, graphics etc, (about 150 Gigabytes) are on a partition on my third drive and one of the partitions on this drive has all my system image files on it.
Another partition on this drive just has random saved stuff, about 90 Gigabytes.
Doing it this way means I can backup and restore my system image in about 20 minutes because I'm not backing up my software.
All the stuff I can't afford to lose ever, is backed up on at least 2 of 3 external hard drives.
Mike