Edits to connection string sections

Author: gsteve88

includes/iot-hub-howto-file-upload-dotnet.md

@@ -31,12 +31,12 @@ Follow this procedure to upload a file from a device to IoT hub:
 
 ### Connect to IoT hub
 
-Call [CreateFromConnectionString](/dotnet/api/microsoft.azure.devices.client.deviceclient.createfromconnectionstring?#microsoft-azure-devices-client-deviceclient-createfromconnectionstring(system-string)) method to connect to IoT hub. See the prerequisites section for how to look up the IoT hub primary connection string.
+Call [CreateFromConnectionString](/dotnet/api/microsoft.azure.devices.client.deviceclient.createfromconnectionstring?#microsoft-azure-devices-client-deviceclient-createfromconnectionstring(system-string)) to connect to IoT hub. See the prerequisites section for how to look up the device primary connection string.
 
 `AMQP` is the default transport protocol.
 
 ``` csharp
-static string connectionString = "{IoT hub primary connection string}";
+static string connectionString = "{device primary connection string}";
 deviceClient = DeviceClient.CreateFromConnectionString(connectionString);
 ```
 
@@ -53,7 +53,7 @@ var fileUploadSasUriRequest = new FileUploadSasUriRequest
     BlobName = fileName
 };
 
-FileUploadSasUriResponse sasUri = await _deviceClient.GetFileUploadSasUriAsync(fileUploadSasUriRequest);
+FileUploadSasUriResponse sasUri = await _deviceClient.GetFileUploadSasUriAsync(fileUploadSasUriRequest, System.Threading.CancellationToken cancellationToken = default);
 Uri uploadUri = sasUri.GetBlobUri();
 ```
 
@@ -63,15 +63,15 @@ To upload a file to Azure storage:
 
 * Create a [blockBlobClient](/dotnet/api/azure.storage.blobs.specialized.blockblobclient) object, passing a file upload URI
 
-* Use the [UploadAsync](/dotnet/api/azure.storage.blobs.specialized.blockblobclient.uploadasync?#azure-storage-blobs-specialized-blockblobclient-uploadasync(system-io-stream-azure-storage-blobs-models-blobuploadoptions-system-threading-cancellationtoken)) method to upload a file to Blob Storage, passing the SAS URI
+* Use the [UploadAsync](/dotnet/api/azure.storage.blobs.specialized.blockblobclient.uploadasync?#azure-storage-blobs-specialized-blockblobclient-uploadasync(system-io-stream-azure-storage-blobs-models-blobuploadoptions-system-threading-cancellationtoken)) method to upload a file to Blob Storage, passing the SAS URI. You can optionally add Blob upload options and cancellation token parameters.
 
 The Azure Blob client always uses HTTPS as the protocol to upload the file to Azure Storage.
 
 In this example, `BlockBlobClient` is passed the SAS URI to create an Azure Storage block Blob client and uploads the file:
 
 ```csharp
 var blockBlobClient = new BlockBlobClient(uploadUri);
-await blockBlobClient.UploadAsync(fileStreamSource, new BlobUploadOptions());
+await blockBlobClient.UploadAsync(fileStreamSource, null, null);
 ```
 
 ### Notify IoT hub of the file upload status
@@ -111,9 +111,12 @@ The [ServiceClient](/dotnet/api/microsoft.azure.devices.serviceclient) class con
 
 To receive file upload notification:
 
-* Create a [CancellationToken](/dotnet/api/azure.core.httpmessage.cancellationtoken?#azure-core-httpmessage-cancellationtoken)
-* Call [GetFileNotificationReceiver](/dotnet/api/microsoft.azure.devices.serviceclient.getfilenotificationreceiver?#microsoft-azure-devices-serviceclient-getfilenotificationreceiver) to create a notification receiver
-* Use a loop with [ReceiveAsync](/dotnet/api/microsoft.azure.devices.receiver-1.receiveasync?#microsoft-azure-devices-receiver-1-receiveasync(system-threading-cancellationtoken)) to wait for the file upload notification
+* Call [CreateFromConnectionString](/dotnet/api/microsoft.azure.devices.serviceclient.createfromconnectionstring?view=azure-dotnet&branch=main) to connect to IoT hub. Pass the IoT hub connection string. See the prerequisites section for how to look up the IoT hub primary connection string.
+* Create a [CancellationToken](/dotnet/api/azure.core.httpmessage.cancellationtoken?#azure-core-httpmessage-cancellationtoken).
+* Call [GetFileNotificationReceiver](/dotnet/api/microsoft.azure.devices.serviceclient.getfilenotificationreceiver?#microsoft-azure-devices-serviceclient-getfilenotificationreceiver) to create a notification receiver.
+* Use a loop with [ReceiveAsync](/dotnet/api/microsoft.azure.devices.receiver-1.receiveasync?#microsoft-azure-devices-receiver-1-receiveasync(system-threading-cancellationtoken)) to wait for the file upload notification.
+
+For example:
 
 ```csharp
 using Microsoft.Azure.Devices;

includes/iot-hub-howto-file-upload-java.md

@@ -24,7 +24,7 @@ This section describes how to upload a file from a device to an IoT hub using th
 
 Follow this procedure to upload a file from a device to IoT hub:
 
-* Connect to IoT hub
+* Connect to the device
 * Get a SAS URI from IoT hub
 * Upload the file to Azure Storage
 * Send file upload status notification to IoT hub
@@ -37,9 +37,9 @@ File upload operations always use HTTPS, but [DeviceClient](/java/api/com.micros
 IotHubClientProtocol protocol = IotHubClientProtocol.MQTT;
 ```
 
-### Connect to IoT hub
+### Connect to the device
 
-Instantiate the `DeviceClient` to connect to IoT hub using the IoT hub primary connection string. See the prerequisites section for how to look up the IoT hub primary connection string.
+Instantiate the `DeviceClient` to connect to the device using the device primary connection string. See the prerequisites section for how to look up the device primary connection string.
 
 ```java
 String connString = "{IoT hub connection string}";
@@ -127,10 +127,10 @@ The [ServiceClient](/java/api/com.azure.core.annotation.serviceclient) class con
 
 Create a `IotHubServiceClientProtocol` object. The connection uses the `AMQPS` protocol.
 
-Call `createFromConnectionString` to connect to IoT hub.
+Call `createFromConnectionString` to connect to IoT hub. Pass the IoT hub primary connection string. See the prerequisites section for how to look up the IoT hub primary connection string.
 
 ```java
-private static final String connectionString = "{IoT hub service connection string}";
+private static final String connectionString = "{IoT hub primary connection string}";
 private static final IotHubServiceClientProtocol protocol = IotHubServiceClientProtocol.AMQPS;
 ServiceClient sc = ServiceClient.createFromConnectionString(connectionString, protocol);
 ```

includes/iot-hub-howto-file-upload-node.md

@@ -51,7 +51,7 @@ const path = require('path');
 
 ### Get a SAS URI from IoT hub
 
-Use [getBlobSharedAccessSignature](/javascript/api/azure-iot-device/client?#azure-iot-device-client-getblobsharedaccesssignature) to get the linked storage account SAS token from IoT hub.
+Use [getBlobSharedAccessSignature](/javascript/api/azure-iot-device/client?#azure-iot-device-client-getblobsharedaccesssignature) to get the linked storage account SAS token from IoT hub. As described in prerequisites, the IoT hub is linked to the Blob Storage.
 
 For example:
 

includes/iot-hub-howto-file-upload-python.md

@@ -31,7 +31,7 @@ This section describes how to upload a file from a device to an IoT hub using th
 
 Follow this procedure to upload a file from a device to IoT hub:
 
-* Connect to IoT hub
+* Connect to the device
 * Get Blob Storage information
 * Upload the file to Blob Storage
 * Notify IoT hub of upload status
@@ -45,17 +45,17 @@ from azure.core.exceptions import AzureError
 from azure.storage.blob import BlobClient
 ```
 
-### Connect to IoT hub
+### Connect to the device
 
-Call [create_from_connection_string](/python/api/azure-iot-device/azure.iot.device.iothubdeviceclient?#azure-iot-device-iothubdeviceclient-create-from-connection-string) to add the IoT hub primary connection string. See the prerequisites section for how to look up the IoT hub primary connection string.
+Call [create_from_connection_string](/python/api/azure-iot-device/azure.iot.device.iothubdeviceclient?#azure-iot-device-iothubdeviceclient-create-from-connection-string) to add the device primary connection string. See the prerequisites section for how to look up the device primary connection string.
 
-Then call [connect](/python/api/azure-iot-device/azure.iot.device.iothubdeviceclient?#azure-iot-device-iothubdeviceclient-connect) to connect the device client to an Azure IoT hub.
+Then call [connect](/python/api/azure-iot-device/azure.iot.device.iothubdeviceclient?#azure-iot-device-iothubdeviceclient-connect) to connect the device client.
 
 For example:
 
 ```python
 # Add your IoT hub primary connection string
-CONNECTION_STRING = "{IoT hub connection string}"
+CONNECTION_STRING = "{Device primary connection string}"
 device_client = IoTHubDeviceClient.create_from_connection_string(CONNECTION_STRING)
 
 # Connect the client