I need to hand in my old phone, but before I do, I want to be sure I am not going to lose any data, including app data.
I've tried the usual
adb backup -apk -shared -all, however this produced a file that is a little under 9 GiB. The device capacity is 64 G and is almost full. Also, I made a backup about five months ago that is a much more plausible 45 GiB. Alas, I don't recall what command I used five months ago. (More specifically, I don't remember what arguments; I'm 99% certain it was some invocation of
What am I doing wrong? How can I back up "everything"? (I don't need e.g. OS stuff, but I definitely have more than 9 GiB of pictures, user-installed apps, and such.)