I have a brand new late 2012 Mac Mini. I am leaving the stock 500gb hdd in the Mini, and using an USB-to-SATA to initialize and format the two other drives I have - 1 is a Samsung 840 EVO 120gb hdd and 2 is a Samsung 840 EVO 1tb ssd. What I want to know is simply, after hooking up each drive via the USB-to SATA connector, it says the drive must be initialised, which brings up the Disk Utility. No problem. But these are 2 brand new, never used drives. So after initialising the drives, do I then need to go ahead and erase them as well, or is the process of initialising them actually erasing them and don't booed to go any further. Thanks you.