Prompt Android local backup script for Ubuntu

As I cant post to developers forums: members (those with fewer than 10 posts) are not permitted to post to development-related forums. It's here

In spare time I've made Android local backup script for Ubuntu, no root required, phone should be connected via USB in MTP mode.

If someone finds it useful you can take it. If there are Linux\bash pro's you can help me to improve it.

veonua/AndroidLocalBackup at github

... rules of the forum are very strict for people who does not post a lot