I recently noticed that my nextcloud instance was missing photos. I have the android app set to automatically upload my photos. When I need to clear up space on my phone, I make a separate backup (because I’m a paranoid SOB and hard drives are relatively cheap). I noticed that nextcloud auto upload missed about 10% of the photos. I’m not going to bash the nextcloud devs, as I recognize that I am using a free product and am owed nothing, but I’m making this post so others are aware of this risk. Apparently I’m not alone https://help.nextcloud.com/t/android-client-does-not-auto-upload-all-images/216849/14
You could use Syncthing for local folder syncing between devices. It’s been really reliable for me.
Thanks but the goal is to sync with the “cloud”, for backup in case of fire or something.
I have hundreds (thousand ?) of albums I need to backup. I can reencode them cause 98% are on CD, but if I loose both my computers and my CDs, I’m done :/
I only use cloud backup for music and the few photos I take with my phone so I don’t really need real-time syncing.