Galaxy watch 4 not able to update

[Birdup]

I had reseted the watch won't install update because it can't copy update. 

[schlurp]

Try factory resetting it again, logging into the same account as your phone, make sure Bluetooth power saving modes and other power saving modes are off,

[Deja3]

I have had this issue with one of my past watches. I was able to update it by checking/running the update directly through the watch and not through the phone. Hope this helps!