Watch the video:
Timestamps:
0:00 - Explanation
0:22 - Installing Google Backup and Sync (Google Drive)
1:24 - Moving from duplicate "My Computer" in Google Drive
2:22 - Choosing to "Merge" for each folder
3:20 - Removing the duplicate computer
Installed Google Drive Backup and Sync on a new Windows install or another computer? Have duplicate “My Computer” folders in Google Drive, and the files aren’t syncing properly? Well, this video shows you how to fix that issue, and merge existing computers together for a better experience in Google Drive Backup and Sync.
Google Backup and Sync: https://google.com/drive/download