Download link: https://drive.google.com/file/d/1gLs...ew?usp=sharing
I tried backing up the userdata.img, but that kept filling up my device storage. It was going beyond 19GB in size. So I cancelled the operation.
Enjoy these files, they will be useful for ROM porting, system restore, or system downgrade.
Editing these files can lead to a brick or a non booting state. So be careful.
I pulled all of these files from my device's system partitions.