hi folks,got a quick question here:

-ive got a G5 powermac desktop with a few RAM upgrades(4 slots left) and 1 internal HD. as i am running out of space, i bought a new internal HD-i believe that i can actually install 2 internal hard drive's in these, right? nevertheless, im wondering if there are any concerns to the data that is already on the old internal hard drive that, assuming there is another slot, i will LEAVE IN PLACE, and ADD another HD. are there any concerns to the old memory when installing a new HD , or new RAM?

thanks for the help!