Automatically create folder for new user

Hi,

I'm trying to replicate some of a feature from our FTP server.

When a customer or supplier want to send us a file I can set it up to automatically create an account but they are not able to send us anything until I've shared a folder with them.

I could do with the ability for an 'upload' folder to be created automatically so that they can send us files straight away.

Then I would just need to setup notifications so people know when a file has been sent to us.

An extra feature would be a button on the login screen (or link in the welcome email) giving very brief details of how to login and upload files so that they don't need to wait for us to get back to them with instruction.

Thanks