Here are the steps to move a folder from your personal "My drive" in Google Drive to a "Shared drive" in Google Drive.
- Open drive.google.com in the web browser
- Locate the folder you wish to move and right-click on it
- Click "Move to"
- Click the left arrow to the left of My Drive
- Click on the arrow to the right of Shared drives
- Click on the drive you wish to move the folder to
- Click Move
- Click Move (again)