Emax

Hello everyone... I have just purchased an Emax (unfortunately it 
didn't come with anything) So I have a couple of questions.
1 - Does adding a hard drive (either external or internal) increase 
any of the sample memory or is the sample memory fixed and adding the 
hard drive just becomes an ease-of-use issue.
2 - If adding the hard drive does add sample memory, then where can I 
get one.
3 - If adding the hard drive does not increase sample memory, then 
what will, and where can I get it.

Thank you all in advance for your help.