PR4100 disable modify permission

Hi, I have a MyCloud PR4100 that I want to set up for use in a media production classroom. I want to be able to have a folder that each student can access and write to it in order to submit videos, but I don’t want them to be able to delete files.
On the user permissions page, I see options for read/write permissions, read permissions, or no permissions.
Is there an advanced section or another way to disable modify permissions? Would I have to use SSH?


You need write permission to create / modify / delete a file. No such thing as a delete permission.
You could create a backup / cron job to move video submissions from the students read-write share to a (for students) read-only class share.