Hi, I use Kubuntu 21.04. I want to set backup settings.

to this,
I configured it like this,



As a destination, I set it to google drive



it gives this message and I can't run backup or I dont know where is the button



so How can I backup my home folder to my google drive?

You would need a different tool to send files to Google Drive.
There are numerous options, but I could not say which one is preferable.

I use the backup tool to send the files to my external drive, then periodically sync that to google using rclone ( a cli tool).

Deja Dup is a common GUI tool that seems to have support for Google Drive.