Operation Owner/Creator Read-only shared user Read-write shared user
Read Yes Yes Yes
Add Yes No Yes
Update Yes No Yes
Remove Yes No No


Please note:

If a share user that has read-write access to an owner created folder and they upload a file, the file cannot be delted by the share user. The file can be read, written and edited, but not deleted.

A share user can only delete uploaded files which are inside the share user's private folder or the user's own createad share folder.