step 1 is the same as the first 2 steps of this guide for the LaCie Rugged Disassembly (USB model) from which some pictures are taken:

remove the orange rubber bumper

open the top lid (with the Lacie logo) by slightly lifting the 6 tabs (the 2 middle ones are underneath the warranty warning)

there is no need to bend the tabs. Start at one of the corners and lift the tab slightly until it unlocks, while you pull gently. Notice that the center tabs (under the warranty seal) open to the opposite side. Work your way along the first side, then repeat on the other.