Can't delete TimeMachine Backupbundle

Hi, I can’t delete files (included TimeMachine file) on shared disk “MYCLOUD-XXXXXX”.
I’m not sure, but I think it’s because I can access it only as guest (My Cloud Home: Backup a Windows or macOS Computer)

Can you please help me to do it?

EDIT: I tricked the MacOS doing the following:
Command+I on the folder/file (like the TimeMachine backup), then click to check the field “blocked”.
Then close the window.
Now reopen with Command+I and uncheck “blocked”.
Then close the window.
That will help to unlock files and let you delete them.