Help How to make a full backup with TWRP

[odatkid]

Hi All,
I recently had to re-flash my ROM and now i have it configured [almost] to how i like. It's like having a new phone. I've rooted and installed TWRP and thought about making a Nandroid backup and am stuck, not sure what to do. Nandroid says an alternative to backing up on the phone, it can be backed up online. Not sure on any of this but I need to make a backup so I don't have to go through what I just did. Took me 10-12 hrs.spread on two days. 1st night i was up to 4am getting this far.
After I do a backup I'm going to try to install Xposed framework and perhaps learn how to make Titanium Backup work again. (Needs write privileges on ext SD Card). I'm on Android 6.01 Marshmallow.
P.S. I don't know how to unlock the bootloader.

Any help is appreciated.

Cheers,
Tom

 

[Mikestony]

Boy it's been quite a while since I've messed with TWRP, but I did find this if it helps:
https://twrp.me/faq/whattobackup.html

Depending on where you store your backups, after backing up, I'd save said backup to your computer

 

[odatkid]

Sorry for the delay but thank you. Very good advice and I will put on my PC once I figure out how to do it.