Like yesteryear free space is again a premium if running SSD drives. As SSD drives come down more in price then more people can afford larger SSD's.A 120GIG SSD your haven't a lot of free space to play with and surprising how quickly a 120GIG SSD fills up as you only have total space to work with of around 111Gigs out of the 120G SSD.
There is a simple solution when fighting for disc space and that is to move your pictures to another drive.
Many users have up to 10GIGS of pictures on their C:Drive and some even more.
Another problem is by having all your pictures on C:Drive is every scan you do the scanner keeps scanning your Pictures folder over and over and this bogs down your scan times.
So easy to grab a picture you want to use is select the drive your pictures are now on from the tree and Bingo, you have that image to post in seconds.
Another thing is not wait till spring, rather do your cleaning whenever your OS requires it.