Quick questions about the appliance

Hi,

A couple of questions:

1- Can the appliance be remotely accessed? 

2- Does the appliance offer any type of encryption besides TSL/SSL for offsite replication for example?

3- Can you for example copy backups to USB disk with long retention periods and delete them from the appliance to free up space and just keep them on the external disk? this will allow the appliance to have more than 5.5TB of storage and get the backups from the external disk whenever needed. Will this work?

Thanks in advance