Microsoft Azure Append Data | Flush Data | Set Properties | Set Access Control

Uploads data to be appended to a file, flushes (writes) previously uploaded data to a file, sets properties for a file or directory, or sets access control for a file or directory. Data can only be appended to a file. This operation supports conditional HTTP requests. For more information, see [Specifying Conditional Headers for Blob Service Operations](https://docs.microsoft.com/en-us/rest/api/storageservices/specifying-conditional-headers-for-blob-service-operations).