Isn't the main disadvantage the one where there's a single drive, so, a single point of failure? So, no multi-drive RAID/ZFS support. This seems like a huge dealbreaker for anyone that cares about backing up their data locally.
At back of it, there is usb A and usb C. What if you buy a 4T usb drive, set beestation sync everything to it. Then you have 2nd backup.