You can do a sanoid sync to another zpool or dataset on the same machine or a remote host, they behave the same. It’s replicating that dataset on the other machine, then sending the snapshots after that point over via zfs send. You can instruct sanoid to prune those snapshots after the send and start new ones for the next send, or just accumulate them so you have points in time to revert to.
IIRC, you can send a zfs snapshot to a file, but I can’t recall how to do that, so AFAIK, you can’t just send it to a file based service like Onedrive. You can use a service like zfs.rent and send them a harddrive with your base sync on it (encrypt it) and then once they’ve brought it online, you can sync to that. Best to test out your methods with the drive hooked up locally.
I know it’s anathema to Lemmy, but the best help you’ll get is Claude where you can paste the errors in and have it sort it out for you as you troubleshoot. It’s pretty good at shit like that.
I stopped buying books from Amazon long ago because their Android app is such dogshit. I can’t imagine going to this much trouble to continue giving them money to reward their terrible engineering.