I'd like to further expand on the topic of ncdu.

rclone is a great utility for syncing data between local and remote (including remote to remote) locations and supports a ton of online services.

Well, rclone also supports an ncdu command modeled after the ncdu utility. It lets you quickly calculate directory sizes on remotes that don't show dir sizes, like Google Drive, for example.

https://rclone.org/

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