Help TWRP, can 52 GB be stored as 8 GB?

[norweger]

I am using TWRP, and I guess it zips the stuff it stores, but is it likely my 52 GB data has been compressed to 8,69 GB?

I would like the Nandroid backup to store everything, down to the last bit, but I am not sure if I set TWRP up right.

 

[Hadron]

Zipping will not compress data that much, not even close.

A nandroid will store /boot, /system and /data, but not /sdcard. So it will back up apps and their internal data, but not anything they store on /sdcard (or the external SD card, if you have one), and will not back up media or other files stored there. This is nothing to do with setting TWRP up right, it just doesn't do that.

For its intended purpose this is fine, because a factory reset will also not normally wipe /sdcard.