Hello,
It is easy to prevent accidental erasure of data by implementing a backup via NOBU or NSSR, but not sharing links. 
To prevent the loss of sharing links in the accidental deletion of a file or a file. It would be interesting to save (or export) links sharing Norton area. Thus in case of accidental deletion, it would be possible to send a sudden sharing invitations and make requests for invitations from people with shared data. 
What do you think about that?
Regards
Guillaume1024