I am planning to change from Lollipop to KitKat on my non-rooted Nexus 5. I'd like to keep as much data and settings as possible.
I've used adb to back up my sdcard.
I'd like to use adb to backup apps and settings. One adb option is system. I would guess that I should not back up system if I'm planning to switch Android versions, but am not sure what system means to adb. What, exactly, does the system option do?
If I don't need data (because I've already pulled data from /sdcard/) and system would not be wise under the circumstances, would
adb backup -apk -noshared -all -nosystem
be appropriate? If not, what should I use?
I've read a fair number of threads here, including Full Backup of non-rooted devices, so if I've missed something, please link to the thread answering this.
Or should I rely on Google backup and restore (turned on in settings) for this?