MacOS Problems with Shared Filesystem

I use a shared filesystem from MyCloud to mount to my Mac. I use it since 2020, so still then was numerous updates of MacOS and MyCloud Firmware. But one problem persist:

When I want to delete from MacOS a large Folder or a large number of files, I get usually the error that I did not have permissions to a curtain file and the delete operation stops. Of course, the permissions are correct. See screenshot. I have to go into folder and delete a smaller number of files, until everything is deleted - very annoying.

Did anyone know why this happened and is their anything that I can do to prevent that.

Screen Shot 2021-09-24 at 07.22.31|690x269