Got some problems with Sony Xperia Z3

[SomethingSimila]

Hello.

There's a couple problems with my girlfriends Sony Xperia Z3. The first one is storage filling up without any downloads. Cannot download any aps or anything, cus internal storage is full. Any suggestions?

Second problem is that when she turns off he phone then later turns it back on, for some reason it starts the camera in a locked screen. So she has to lock the phone the unlock it to continue.

Third problem is the phone keeps restarting without reason. And when it starts up no pin-code is needed to enter the phone.

So. The phone has never been dropped, nor waterdamaged or anything like that.

Welp please!

[Uliwooly]

@SomethingSimilar

Settings > storage > take screenshots and post them here, that will tell you what has been using up the internal storage

As for the other issues, seems like malware, you could repair the phone with XC and report back 

Xperia Companion (XC)

Software Repair Guide

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[Jake-SonyXperia]

Hi SomethingSimilar,

Please use the link below to backup the handset with Xperia Companion

Backup