After killing the guards, grab the health and ammo and leave through the other door. Follow it along to the end of the walkway and drop down to grab the guarded data disc from the wall. DonΓÇÖt hop on the platform - youΓÇÖve already killed everything up there. Continue along the walkway in Block A, then return to where the data disk was taken and drop down into the hole in the floor (note - it may also be a small platform).
