I would say - dont do anything till the blockchain is ready. You could download the blockchain by yourself, it is the faster way.
550GB...depends on your CPU power, but in my guess that is like 5 hours.
Can you post screenshot of the error? You have to have at least one plot to start mining. If 550gb is your plot and you are still plotting, that is why it is not working. :)
Yes, your "account" is not verified till you dont send some Burst, but you really not have to!
Good luck Mantas779!
i was finally ready with plotting , now its mining , along side my DGB miner
aldo i dont see a lot of changes , how long before a burst comes out?
That totally depends on:
That should be it. :)
But with 500gb capacity you should go over to m.burst4all.com :)