launcher / game setting / reset settings (I clicked) now I have to download 27.5 gb again? Is there any other solution?

No, it will do a file check and download which files are missing.
The reset settings button completely resets your config file from ANY changes, so make sure you point the launcher to the directory where your black desert installation is at.

it looks like it will work. on which continent is the server?

Looks like your connection to OgreFest | Black Desert Online Private Server was lost, please wait while we try to reconnect.