I root then use TWRP to backup the data partition to memory card. I'vr also used Titanium Backup (paid version) in the past (non-root phone) with good results,

I root then use TWRP to backup the data partition to memory card. I'vr also used Titanium Backup (paid version) in the past (non-root phone) with good results, but not w/in past 3 years so ymmv.