schedule a shared folder for deletion
The ability to share a folder with a contact and schedule that folder for deletion in X number of days.
so that After the time span has passed the folder is deleted and until that point in time anyone the folder has been shared with is automatically informed that the folder will no longer be available.
I personally see the rise of digital handoff of data becoming a larger and larger issue... for example a breakup or divorce that comes with a few years worth of OneDrive photos... we don't want to have the folder shared indefinitely as this is impractical.
"Come get your stuff because I'm changing the locks in a week" kind of thing.