True, I agree with you. Writing snapshots to SD card first means more wear to the flash storage.
However, that is minimal, compared to how much (and how often) recorder writes. A snapshot of a few megabytes every day isn’t much when compared to a maximum of one write on every second (that’s 86400 times more often than a daily snapshot). Sure, each write is only a few kilobytes (but on different regions of the same file, which means different sectors), and not all seconds require something to be written…
Still, I suggest making sure the recorder database size is under control, and reducing how often it writes to storage. Also because, if you keep having many writes, moving the database to a network drive will just move the wear from one device to another.
(I don’t want to discourage you, I’m just pointing to what could give the best results for the amount of effort.)