Drag files into Google Drive. On your computer, go to drive.google.com. Open or create a folder. To upload files and folders, drag them into the Google Drive folder. Use Backup & Sync. Install the application on your computer. On your computer, you’ll see a folder called “Google Drive.” Drag files or folders into that folder.
https://support.google.com/drive/answer/2424368?co=GENIE.Platform%3DDesktop&hl=en

