Hello,
I am having difficulties using ADB to backup my phone to my computer. I use Ubuntu 15.10 and ADB version 1.0.31 (should be the latest). I have a Samsung Galaxy S6 with Marshmallow 6.0
The problem is when I use the command line, no backup of the phone happens. Here is my command:
$: adb backup -all
sometimes I use just "adb backup" and with the same result.
The result is a 0 KB file called "backup.ab" being created. Which is useless. I've tried different tags like -system -apk -all, all with the same results.
After typing it in on the command line, it prompts me by saying "Now unlock your device and confirm the backup operation." After 2-3 seconds, it goes back to a regular prompt ready to accept input.
On my phone, nothing happens. There is no prompt to confirm backup. This also happened with the previous version of android, Lollipop.
Please help!