mock-redfish-server/mockup/redfish/v1/Systems/1/Storage/index.json

{
    "@odata.type": "#StorageCollection.StorageCollection",
    "Name": "Storage Collection",
    "@odata.context": "/redfish/v1/$metadata#StorageCollection.StorageCollection",
    "Members": [
        {
            "@odata.id": "/redfish/v1/Systems/1/Storage/1"
        }
    ],
    "@odata.id": "/redfish/v1/Systems/1/Storage",
    "Members@odata.count": 1
}