Protect with password?

Hi!

I recently made a pirate box on a TP-link-MR3040 router. I really like the idea and how its not connected to the internet, which got me thinking that this could kinda be a personal cloud - But I have absolutely no idea what I am doing.

For me to make it into a personal cloud, I need some help.

1.) How do I remove the "Thanks" message that comes up every time I connect to the box?

2.) Is there a way to password protect the connection, so If i connect to the box, I have to enter a password.

3.) How can I rename files that are uploaded to the Box? Is there a way to do this?

Please, if you have the time, can you type out step by step how to do this? Even if it is just one of the questions, as I have no idea how to do this.

Thanks,
Bret