You probably know that the unlimited storage option of Google Photos is not applied to all the photos and videos you previously uploaded to your Google Drive. Thus you may want to move your photos and videos from Google Drive to Google Photos to have unlimited storage to your advantage. If you have selected the High quality option (as opposed to Original), your photos and videos do not count against your Google storage quota.
To easily move photos from your Google Drive to your Google Photos, you can simply sync Google Drive and Google Photos. Google Photos and Google Drive functions in perfect sync, and Google Photos can even reside inside your Google Drive like any other folder.
To enable this feature in Google Drive, follow the process below: