Trying for the first time to root my device, using a Nexus 5 that I just got yesterday.
I'm naturally trying to back things up before doing anything that can wipe memory, but the size of the .ab files that backup programs (Nexus Root Toolkit, Holo Backup etc.) produce without root access are around the ~22MB area.
I've googled around and the consensus seems to be that it's far too small - BUT, I've only just got the device, and thrown a handful of apps (Twitter, 8SMS, etc.) onto it, no music or anything. Has this backup been performed correctly?
Also - when unlocking the bootloader and rooting the device, do I need to put the stock ROM back onto it, or does it remain there naturally?
Apologies if that last part was a bit oblivious but the places I've looked haven't been exactly clear, seeing as most of them go for custom ROMs.
Thank you in advance!