Quota and Functionality Questions related to Device Backup

[distancesprinter]

I am confused about inconsistences between Device Backup on two different Pixel phones:

• On my old Pixel phone, the Backup app says the backup will use Google One storage, so I do not have it turned on.
• On my new Pixel phone, the Backup app doesn't mention Google One. In fact, it explicitly states that the device backup will not count towards "Drive" storage.
  

I'm not sure the new Pixel phone is fully patched (just took it out of the box) so it's possible the software hasn't been updated to reflect the Google One service.

I have the following questions:

1. Does the device backup count towards a Google storage quota or not?
2. Is there a difference between Google One and Google Drive?
3. On both devices, the device backup states that the information is encrypted before being uploaded, but it is not clear whether the backup is inaccessible by Google (can Google decrypt the backup)?
4. The device backup states that it will backup: apps, app data, call history, contacts, device settings (including Wifi passwords) and SMS & MMS messages. How do I restore these things on the new phone if I back them up on the old phone first?
5. Can I selectively restore apps and app data for only a few apps? There are some apps that are device-specific (e.g. Syncthing) where I don't want to necessarily restore the settings and app data associated with that app, because my shared folders will be located in a different place on the new phone. I would rather set up from scratch and establish my new folder locations, then allow the files to sync through Syncthing.
   

Thanks for any answers you can provide to these questions.

I would also welcome links to resources that explain how this works, especially vis-à-vis the new Google One branding.

 

[jwoegerbauer]

With regards to "Is there a difference between Google One and Google Drive?" look inside here