@applee I managed to get the syncing done by placing a symlink in the Pictures folder. As stated above, placing a symlink in the root home folder didn't. At first there were some duplicates shown in the Gallery app but they were handled after a while and you could see the reshuffling going on. maybe it would be an idea to have a preference, like in SailfishOS, to automatically store pictures on the SD card if one is present?
Best posts made by droid001
RE: Symlink from SD card to home dir without restrictions