Help with iPhone 6s 64gb storage

I recently bought n iPhone 6s with 64gb. My phone says 62.1gb of 64gb used. When I connect the phone to iTunes in my computer, it shows that I have 54gb free. Somehow the
"storage almost full" keeps popping up on my phone. I just updated to the latest 11.0.2 version, i reset the phone to factory mode, and nothing works. Any ideas on how to fix this?

But… But… It is an APPLE! Their stuff is SO INTUITIVE!

You're doing it wrong.

I guess the android software is taking up some gb's. Same thing for computers and gaming consoles i noticed

Could try contacting Apple Support via Twitter.

There are usually discrepancies between iTunes & the iPhone as far as storage. Not sure why.