title: azure site wont scale down from basic as incorrectly reporting size
body: <p>I have two asp.net core apps which both are deployed via github integration directly to their own respective azure websites. One site has a custom domain and the other doesn't.</p>
  
  <p>When initally configuring the integration on both sites they initially failed with space related warnings. So i scaled the sites to be a basic(1 small). I don't know 
  why i needed to do this as both the apps are considerably less than the 1G which i believe a shared webapp has as a limit. (the two sites on my local HDD are 117M and 120M respectively)</p>
  
  <p>As a result of this i have two sites both sharing the same service plan which is a £41 a month rather than having one site on free and the other on a shared £7 a month(as it needs a custom domain)</p>
  
  <p>If i try and scale down the serviceplan i get the following error. (redacted as expected)</p>
  
  <pre><code>{
  "authorization": null,
  "caller": null,
  "channels": null,
  "claims": {},
  "correlationId": null,
  "description": "Failed to update App Service plan defaultserviceplan: {\"Code\":\"Conflict\",\"Message\":\"Storage usage quota exceeded. Cannot update or delete a server farm.\",\"Target\":null,\"Details\":[{\"Message\":\"Storage usage quota exceeded. Cannot update or delete a server farm.\"},{\"Code\":\"Conflict\"},{\"ErrorEntity\":{\"ExtendedCode\":\"11006\",\"MessageTemplate\":\"Storage usage quota exceeded. Cannot update or delete a server farm.\",\"Parameters\":[],\"InnerErrors\":[],\"Code\":\"Conflict\",\"Message\":\"Storage usage quota exceeded. Cannot update or delete a server farm.\"}}],\"Innererror\":null}",
  "eventDataId": null,
  "eventName": null,
  "eventSource": null,
  "category": null,
  "eventTimestamp": "Wed Jun 21 2017 11:01:25 GMT+0100 (GMT Summer Time)",
  "id": "Failed to update App Service plan_Wed Jun 21 2017 11:01:25 GMT+0100 (GMT Summer Time)",
  "level": "1",
  "operationId": null,
  "operationName": {
      "value": "Failed to update App Service plan",
      "localizedValue": "Failed to update App Service plan"
  },
  "resourceGroupName": null,
  "resourceProviderName": null,
  "resourceType": null,
  "resourceId": null,
  "status": {
      "value": "Error",
      "localizedValue": "Error"
  },
  "subStatus": null,
  "submissionTimestamp": null,
  "subscriptionId": null,
  "properties": {
      "correlationIds": "REDACTED"
  },
  "relatedEvents": []
  </code></pre>
  
  <p>}</p>
  
  <p>How can i diagnose what is taking up the space, or report this issue?</p>