Running out of room on Endeavor SSD

I have found that my 120GB SSD portion of the Endeavor drive is filling up fast and quite by accident I found a WD video dealing with this matter and it gives step by step instructions on how to solve the problem.    Here is the link to the videos.  http://www.amazon.com/Black2-Dual-Drive-2-5-WD1001X06XDTL/dp/B00GSJ9X4Q/ref=sr_1_1?ie=UTF8&qid=1392234599&sr=8-1&keywords=wd+ssd+hard+drive