itunes error 3259 AND lots of "other" files

hello,

first things first, I have read this article: Apple software on Windows: May see performance issues and blank iTunes Store - Apple Support I am NOT running windows or any of the other programs listed. this article did not help my problem. so please don't tell me to read it....

okay, so the problem: I'm trying to restore my iphone 5c because I have a lot of "other" on my iphone's storage... and it also needs the software update.

I get the error 3259. r

estarted both iphone and macbook air. (ejected iphone from macbook air as well.)

disconnected and re connected the wifi on both devices.

could this be related to my massive amount of "other" files in my macbook air??? question asked about it on here: mysteriousdisk space, gibberish files?

should I just wipe my whole computer and iphone or what? this is a nightmare.