The SpaceX CRS-8 capsule carried zero cargo with it to the International Space Station.
For the ISS Dragon cargo flights, the ISS's Canadarm2 grapples its Flight-Releasable Grapple Fixture and berths Dragon to the station's US Orbital Segment using a Common Berthing Mechanism (CBM)
 space suits could be used from the Shuttle and only Russian suits could be used from the Service Module

