You should apply a rule similar to 3-2-1: 3 copies of the data 2 copies on different storage mediums 1 backup in a separate location. Ideally, a backup solu

You should apply a rule similar to 3-2-1: 3 copies of the data 2 copies on different storage mediums 1 backup in a separate location. Ideally, a backup solution on the OS would target the browser profile itself at regular intervals, and you could allow the user to export the data into a file that can be downloaded by the browser (or copy/pasted). It should be obvious that any form of browser storage is unreliable, and MUST be treated as such, and it should be EXPECTED to be deleted at a moments notice - setting such expectations encourages good practice at backing up your data incase of a failure. Don't rely on others to ensure business critical data is stored and accessible - that's partially on the users/application to offer what they can.