So I have the 4 bay hp micro server which I have used up all the bays on.
Is there a way to add another 4 drives without spending loads of money?

i have 4 1tb drives just sat doing nothing and I would like to use them for backups and storage.
im not keen on using external USB enclosures as I would need a power supply for each one.

So other than upgrading my server case is there an add on I can buy?