What is filling up my "other" storage?
I purchased my Macbook Air about a year ago, and I mainly used it for Photoshop and just browsing the web, but recently I've been unable to save or do anything in Photoshop because my Startup Disk is full, so I checked my Storage to see what was filling it up and saw that I had 92 GB out of my 120 GB were filled up by "Other". Now my question is, what exactly is filling up my "Other" and how can I erase some of it in order to free some space?
Thank you!
MacBook Air, OS X Yosemite (10.10.2)