add storage setup instructions

Author: laujan

articles/applied-ai-services/form-recognizer/quickstarts/try-sample-label-tool.md

@@ -131,7 +131,7 @@ Train a custom model to analyze and extract data from forms and documents specif
 
 ### Prerequisites for training a custom form model
 
-* An Azure Storage blob container that contains a set of training data. Make sure all the training documents are of the same format. If you have forms in multiple formats, organize them into subfolders based on common format. For this project, you can use our [sample data set](https://github.com/Azure-Samples/cognitive-services-REST-api-samples/blob/master/curl/form-recognizer/sample_data_without_labels.zip).
+* An Azure Storage blob container that contains a set of training data. Make sure all the training documents are of the same format. If you have forms in multiple formats, organize them into subfolders based on common format. For this project, you can use our [sample data set](https://github.com/Azure-Samples/cognitive-services-REST-api-samples/blob/master/curl/form-recognizer/sample_data_without_labels.zip). If you don't know how to create an Azure storage account with a container, follow the [Azure Storage quickstart for Azure portal](../../../storage/blobs/storage-quickstart-blobs-portal.md).
 
 * Configure CORS