Additional Backup above 1 TB if needed

Hello
I am working on offering some new value added services to our clients. And have a couple of questions.
1) Should we need more than 1 TB of Backup Space what will be the procedure, order another block of backup space to go with existing 1 TB or is there some other procedure?

2) Where is the backup physically held? Part of the World and Data Center. Needing to see what additional bandwidth charges we might entail since we own our own cloud platform in a Data Center in Phoenix AZ USA.

Thanks!

Roy Randolph
COO
KartHost