This page will cover modifications made to all the external pallets and platforms on the ISS and will also help in updating the ISS paper model in 1:100 scale.
The ISS has stowage locations for payloads or ORUs (Orbital Replacement Units). These units are replaced either by astronauts during EVA or by DEXTRE robot (SPDM).
There are 3 External Stowage Platforms:
There are 4 ExPRESS Logistics Carriers:
These platforms and carriers are mounted on the Integrated Truss Structure (ITS) of the ISS.
AXM Paper Space Scale Models Blog 