Of memory or of disk space? (nyuk nyuk)
Here you go. 16 internal bays. Install 2 TB drives, and you can even protect everything with RAID 1: http://h10010.www1.hp.com/wwpc/us/en/sm/WF25a/15351-15351-241434-241646-241477-3884315.html
BTW, if you are looking for someone who has experience with one of these, it ain't me. I roll my own. All I did was run over to HP and look for 16-bay servers (8-bay would take 8 2TB drives and leave you with no spare space).