Photos and videos deleted in Drive will not be deleted from Photos, nor will the media deleted in Photos be removed from Drive. Clearly, the media across the two services will be connected. For those wondering, photos and videos copied in Original Quality from one platform to another will count towards storage quota on both.
Meanwhile, people will still be able to use the Backup and Sync option on Windows and macOS to upload to media in High Quality as well as Original Quality. Notably, photos and videos uploaded in High Quality will not count against the user’s account storage quota. The photos and videos that users upload in Original Quality using the Backup and Sync will only be counted once towards their storage quota.
Source: indianexpress.com