Hello Perrone.
Probably you're using the HTTP Tunnel or Direct database connection, which performance depends on the MySQL connection speed.
In this case, you should try to enable "Cache export" option:
As an option, you may use Bridge Connection, which will export 200'000 products in a few minutes.
Hello Perrone,
Bridge connection is the fastest way to manage store database, however, it requires manual synchronization, which means that you have to Get Data from Web every time before you have started working in Store Manager and Post Changes to Web once the changes are ready to be published.
Concerning the Timeout error. You should try to increase the Bridge connection timeout to 800 seconds: