Not sure what the Model number is. This is not the current slim portable drive but an older, solid metal one with 2 Firewire 800 ports as well as a USB3 port. The drive has failed and I need to know how to open the unit to replace the 2.5" drive within. I’m guessing there are screws underneath the 6 rubber feet. Grateful if you can help. I know how to open the current very slim models but not this one. Cheers!