I was about to try something similar. I would really like to have off-site backup, even if I need to sneakernet/autonet it somewhere regularly.
I have one SafePoint auto-updating daily to another WD device (a WD MBL), which I now feel is semi-safe.
Next, I wanted to connect an external drive (we’ll call this Drive A) to the MyCloud to create a second backup SafePoint, which, once updated, I would take to an off-site location (a deposit box).
I would then connect another external drive (Drive B) and create a third SafePoint, which I would take to the off-site location the next week, bringing Drive A back and reconnecting it for updates.
I had HOPED that it could do auto-updates on these targets when the target is available to the MyCloud. But it sounds like this will not be possible?
I dunno–I think I am going to try it anyway soon. I’m hoping worst case is that I have to manually update the SafePoints on the external drive(s), and it will still auto-update the first SafePoint to the MBL without any trouble here.
Or else, really, this SoHo-grade device really got downgraded for me to far below Buffalo or other SoHo NAS boxes that can do secure live updates or mirroring across distance to off-site targets. I mean. It’s NAS. You want an off-site mirror of this information, right?
Will report back with what works.