Forum Discussion
Students deleting files
MikeBrady : For student read-only files, https://support.microsoft.com/en-us/office/use-folders-to-create-read-only-files-for-students-or-other-team-members-0e7791d7-8c9c-4749-9bca-984289477988 might be more appropriate.
The Files tab in general mirrors all Documents stored in the underlying SharePoint group site and creates separate folders for Files related to each channel. It was intended for collaboration scenarios and does not put any additional restrictions on who can edit/delete vs not.
https://support.microsoft.com/en-us/office/collaborate-on-files-in-microsoft-teams-9b200289-dbac-4823-85bd-628a5c7bb0ae
MikeBrady members have modify permissions by default. You can change this by going to the sharepoint library and changing the library permissions. Delete the permissions for "Members - *Team name* and re-add them with read only permissions.