So, good news, the recovery does indeed work! In case anyone is interested, here's a bunch of scripts I used to archive these photos, now also with the ability to retrieve the archives - this is the first time I needed the retrieval, so I only implemented it today 🙂
@PeterCxy Personally, I wanted to make something like #Tarsnap but as a more flexible option not hard-locked on #AmazonGlacier....
That being said I have a similar problem and I'm looking at a solution but besides georedundant setup of a redundant pair of NAS boxes I've yet to find a satisfactory solution for my [paranoid?] requirements...