The Storage Module changes the Seamoth differently depending on which slot of the Seamoth's upgrade panel it is applied to. A container is generated on the Seamoth based on the corresponding slot it is placed in.
Each Seamoth container has a capacity of 16 storage slots (4x4) and can be opened when outside the Seamoth. With a maximum of four Storage Module it is possible to have 64 storage slots on a single Seamoth. If the vehicle using the Storage Module is destroyed, all of the contents of the Storage Module and the module itself will be deleted.
When used on the Prawn Suit it will add 6 storage slots to the default 4x6 inventory.