Some corpses are lootable! It seems to be incredibly rare, but you can loot a keycard from some corpses, and this open the storage locker building. You’ve probably seen it a dozen times, it’s the building that you can’t seem to get into, NOW you know why. Not that much to it inside, just shelves and shelves of suit schematics, ionized gas, weapons components,... honestly engineering got a lot easier once I found these buildings.
so yeah, make sure you scan every. Single. Corpse. From now on. Good luck!