Azure Data Lake Storage (ADLS) is a highly scalable and secure data lake for high-performance analytics workloads. The az dls fs download command is used to download files from ADLS. However, this command is part of the Azure CLI, which is cross-platform and can be used on Windows. This article will guide you through the process of downloading files from ADLS using the Azure CLI on a Windows environment.

Prerequisites:

1. Azure CLI installed on your Windows machine.
2. Proper authentication to access your Azure account.
3. Necessary permissions to access the Data Lake Storage.

Steps:

1. Install Azure CLI: If you haven't installed the Azure CLI, you can download and install it from the official Azure CLI installation page.

   Alternatively, you can use the following PowerShell command to install it:

   Invoke-WebRequest -Uri https://aka.ms/installazurecliwindows -OutFile .\AzureCLI.msi; Start-Process msiexec.exe -ArgumentList '/I AzureCLI.msi /quiet' -Wait

2. Login to Azure: Open Command Prompt or PowerShell and log in to your Azure account using:

   az login

   Follow the instructions to authenticate.

3. Download Files from ADLS: Use the az dls fs download command to download files from your Data Lake Storage. Here is an example:

   az dls fs download --account <YourDataLakeAccountName> --source-path /path/to/remote/file --destination-path C:\path\to\local\directory

   Replace <YourDataLakeAccountName>, /path/to/remote/file, and C:\path\to\local\directory with your actual Data Lake account name, the path of the file in ADLS, and the local directory path where you want to download the file, respectively.

Examples:

1. Example 1: Download a single file:

   az dls fs download --account mydatalakeaccount --source-path /data/sample.txt --destination-path C:\Users\YourUsername\Downloads\sample.txt

   This command downloads the file sample.txt from the data directory in your Data Lake Storage to the Downloads folder on your local machine.

2. Example 2: Download a directory:

   az dls fs download --account mydatalakeaccount --source-path /data/ --destination-path C:\Users\YourUsername\Downloads\data --recursive

   Adding the --recursive flag allows you to download all files within the data directory and its subdirectories.