For every one legitimate phone call I make or receive, I get 10 junk calls. At what point can it be deemed harassment?
A good app to look into is Mr. Number. I use it and it works really well for flagging calls and you can then just block them in the future through the app.
You can download Dropbox and save pictures and files to that and then erase them off your phone. That helped me a ton. Once I deleted several apps that I never used and saved photos to Dropbox I had plenty of room.
I'd say pick one picture you won't miss, or 2 if you want to try selecting multiple, and just test it.
There is a setting somewhere so that when you plug your phone into your laptop it will not recognize it as a phone and recognize it as a flash drive and you can easily move the files you want to save. That will save you a step. I have done it this way to transfer music to on an old phone from my laptop but I don't remember the specifics.