Update nsg-flow-logs-overview.md

Author: shijaiswal

articles/network-watcher/nsg-flow-logs-overview.md

@@ -555,7 +555,9 @@ NSG flow logs are charged per gigabyte of ***Network flow logs collected*** and
 
 If traffic analytics is enabled with NSG flow logs, traffic analytics pricing applies at per gigabyte processing rates. Traffic analytics isn't offered with a free tier of pricing. For more information, see [Network Watcher pricing](https://azure.microsoft.com/pricing/details/network-watcher/).
 
-Storage of logs is charged separately. For more information, see [Azure Blob Storage pricing](https://azure.microsoft.com/pricing/details/storage/blobs/).
+Storage of logs is charged separately. For more information, see [Azure Blob Storage pricing](https://azure.microsoft.com/pricing/details/storage/blobs/). Few considerations:
+1. NSG flow log workflow makes [Create Container](https://learn.microsoft.com/en-us/rest/api/storageservices/Create-Container) call periodically and is directly proportional to associated number of MAC's and are charged as per storage write operations.
+2. Any configuration change or subscription policy leading to failed upload attempts remains chargeable in accordance with storage billing policy.
 
 ## Availability