Erasing files on G Drive

Help, I used to have my 4TB G Drive connected to a wifi router but subsequently moved and no longer use the router but when I connect by G Drive directly to my MacBook Air, I am not able to see any of my files. All I want to do is delete the old backups and start from new again… Can anyone help me please?
Thanks.

The backups are stored within Time Machine. You will need to launch Time Machine to view your backups.