> ## Documentation Index
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# How to Create a Downloadable File from Azure

*Last Updated: October 09, 2024*

Azure Blob Storage allows you to generate a Shared Access Signature (SAS) token, which provides secure, time-limited
access to your blobs (files) without sharing your account key. This guide will walk you through the steps to create a
downloadable link using a SAS token.

**Using Portal:**

### **Step 1: Log in to the Azure Portal**

1. Go to the [Azure Portal](https://portal.azure.com/).
2. Log in with your Azure account credentials.

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### **Step 2: Navigate to Your Storage Account**

1. In the Azure Portal, search for **"Storage accounts"** in the search bar at the top.
2. Click on **"Storage accounts"** in the search results.
3. Select the storage account that contains the blob (file) you want to share.

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*Last Updated: October 09, 2024*

### **Step 3: Access the Blob Service**

1. In the storage account overview, scroll down to the **"Blob service"** section in the left-hand menu.
2. Click on **"Containers"** to view the list of containers in your storage account.
3. Select the container that holds the blob you want to create a link for.

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### **Step 4: Generate the SAS Token**

1. Inside the container, find and click on the blob (file) you want to share.
2. At the top of the blob's properties window, click on **"Generate SAS"** (sometimes labeled as **"Shared Access
   Signature"**).
3. In the SAS token generation window, configure the following options:
   * **Permissions**: Select the permissions you want to grant. For a downloadable link, you typically need **Read**
     permissions.
   * **Start and Expiry Date/Time**: Set the start time and expiry time for the token. This defines how long the link
     will be valid.
4. After configuring the settings, click **"Generate SAS token and URL"**.

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*Last Updated: October 09, 2024*

### **Step 5: Copy the SAS URL**

1. Once the SAS token and URL are generated, you'll see a URL in the **"Blob SAS URL"** field.
2. Copy the entire URL. This is your downloadable link.

### **Using Azure SDK for Python**

You can use the `azure-storage-blob` library to generate a SAS token programmatically with python:

### **Installation**

First, install the Azure Blob Storage SDK for Python:

```bash theme={null}
pip install azure-storage-blob
```

### **Python Code Example**

```python theme={null}
from azure.storage.blob import BlobServiceClient, generate_blob_sas, BlobSasPermissions
from datetime import datetime, timedelta

# Set your connection string and container details
connection_string = "your_connection_string"
container_name = "your_container_name"
blob_name = "your_blob_name.txt"

# Create a BlobServiceClient object
blob_service_client = BlobServiceClient.from_connection_string(connection_string)

# Generate a SAS token for the blob
sas_token = generate_blob_sas(
    account_name=blob_service_client.account_name,
    container_name=container_name,
    blob_name=blob_name,
    account_key=blob_service_client.credential.account_key,
    permission=BlobSasPermissions(read=True),
    expiry=datetime.utcnow() + timedelta(hours=1)  # SAS token valid for 1 hour
)

# Construct the full URL with the SAS token
blob_url = f"https://{blob_service_client.account_name}.blob.core.windows.net/{container_name}/{blob_name}?{sas_token}"

print(f"SAS URL: {blob_url}")

```

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