You could install the Google Drive client and then run WinDirStat against the virtual drive letter that it creates:

https://support.google.com/drive/answer/10838124

You can use `rclone ncdu` on Google Drive

https://rclone.org/commands/rclone_ncdu/

It is great at answering the question - where is all my storage? Also has a handy interface for deleting stuff.

About a decade ago when I worked in IT I used Treesize Pro to scan SMB volumes and delete the MOVIES that employees had downloaded on their computers, which meant they were downloading MOVIES to our SAN because we used roaming profiles. I'll never get over that these people downloaded literal pirated movies to our servers. It was constant. I ended up putting file size limits on their directories, or a file extension block, I forget.

The free version can't scan network drives if the servers on a domain IIRC.

https://www.jam-software.com/treesize_free

edit: Oh I thought I read SMB drive not google drive for some reason. I'm not sure if this does that or not. It's my favorite GUI so worth checking out.

Mount Google Drive as a folder (rclone) and run WinDirStat?