With the launch of Backup and Sync, Google finally announced its plans for the Drive app for desktop. Support for the app is ending on December 11th before it gets completely shut down on March 12, 2018. If you’re still using the app, you might see a notification next month that it’s “going away” and that Google wants you to either use Backup and Sync or Drive File Stream, which is the enterprise version of the app.
Backup and Sync is the consumer version that can basically upload all the files you want to sync with it and works kind of like a hybrid Google Drive and Google Photos Uploader. Drive File Stream lets you access your My Drive files, Team Drives files, and even stream your files on demand right from your computer.
Source: The Verge