HTC One - sync manager

[10Jun2Odiga]

I am very annoyed with the htc sync manager. first thing first, the updated version ****s everything up. it just hangs. second, I am not able to even transfer any file. third, what the hell is this others thing on my phone storage and it takes up over 15GB. it's like half of my phone space is taken up. frustrated. please reply on ways to help me with these issues. Thank you