Then, I plugged a card reader that has 4 drives. Nothing showed up!So, the answer to your question is NOTHING! You are just unable to add more. Of cource you can use volume mounting as suggested above
Then, I plugged a card reader that has 4 drives. Nothing showed up!So, the answer to your question is NOTHING! You are just unable to add more. Of cource you can use volume mounting as suggested above