I am a happy Family Hub RS8000 user. I was until yesterday, when tried to finally connect my Google calendar.
So I setup a Samsung Account first, then added a Google Calendar.
First attempt was successful, everything worked like a charm. Then I re-connected calendar to re-sync - worked.
But today it's a disaster - the connected calendar did not synced in the morning and had some "network issues"
So I tried to reconnect as a day before - and it is now saying - "This account already exists on your device"
So, ok - delete Calendar App Data - good, all settings are gone, as well as calendars - tried to add a calendar - "This account already exists on your device" - again....
Hmmm.. maybe there is some additional account storage - so I reconnected Samsung Family account - still nothing, same message "This account already exists on your device"
So - to a frustration of my daughter who painted a lot on a whiteboard - I ran a factory reset. After struggling with reconnecting to a Samsung Account, and next 2 factory resets with different location settings - still same issue "This account already exists on your device".
Of course I detached, removed, deleted a Google authorization for Family Hub several times in my Google settings
No information of any assigned device/appliance I could find in Samsung Account.
Any help from you, guys? I'm frustrated, as it worked correctly not more than a day