How to copy the backup file to my computer?

[Hherrmmann]

Using AuthPro now for a year, and I'm very pleased with it.

Now I'm looking for a way to store the AuthPro backup file to my computer, so that I can always restore in case my phone gets stolen.
However, on the location where I stored the backup file, I cannot find it with my file manager, nor when I browse the phone via my computer. (BTW, AuthPro shows that the backup is there).
About a year ago, I managed to locate the backup file and copy it to my PC, but I don't remember how I did it. Obviously I am nmot able to reproduce it.

Any hints are welcome.

Cheers, H