The purpose of the tools in previous post is just to gather intel, they won’t modify anything if used as instructed
It’s not an easy way, but you can try it safely if you wish.
The note #1 was just informational, in case you’ll have to restart.
The goal was to verify that the partition (see it as a container) is big enough, so we could try to resize the filesystem in it.
Anyway if you can start over with installing, I suggest you first blindly try the “Resize” TWRP option, and the “Format” if the “Resize” does nothing.
I’m not aware of MotoG3, but if your phone is encrypted I suggest the following steps before re-install :
- of course, remove any SDCard
- disable screen lock or pattern, remove fingerprint, reboot once to system
- before installing, regardless of above Resize result, format (not wipe) the data partition using TWRP