Add the Azure Storage module to your project. You can do this by searching for Azure Storage in Marketplace and adding the module
Create a new microflow in your project and add the Connect to Azure Storage action from the module to the microflow. Enter the Account Name and Account Key for your Azure Blob Storage account in the properties.
Add the Get Blob action to the microflow. In the action properties, specify the container name and blob name for the file (can also be the path) you want to read.
Run the microflow to retrieve the file from Azure Blob Storage