Flipper File System - Write Protectc files?

I think it would be of use to have the capability to set the files as “read only” on the flipper file system.
The use would be for example to “lock” a saved file from changes just in case some app or non standard firmware messes it up,

One would for example save a file like a rolling code or card dump and even if a non standard firmware does have a bug generating next codes or some app is not properly used and change a card dump, etc setting the file as soon as saved as “read only” would prevent acidental changes to that dump.