Just like the Medium Storage, it also has 8 attachment points, meaning it can support a total of 4 Tier-2Modules
If you put this on a Medium Rover, you will no longer be able to drive it. This is meant for Large Rover primarily, however, if you have a second vehicle, you can use the Medium Rover as a trailer for it by attaching with a cable
It is possible to build Large Storage on top of Large Platform if you place the platform in front of the vehicle bay