How to Build an Automated Windows Disk Space Alert Tool Using Python

Running out of hard drive space on a production machine or server can cause critical operating system crashes. Monitoring storage capacities manually everyday is inefficient.

We can build a passive automation tool using Python's built-in shutil library. This tool automatically checks storage levels and triggers a warning dialog popup box the second space drops below a safe limit.

Step 1: The Monitoring Script Framework

import shutil
import ctypes

def check_disk_space(minimum_gb=10):
    # Retrieve system drive statistics directly from the root OS kernel
    total, used, free = shutil.disk_usage("/")
    
    # Convert bytes integers into easily readable Gigabytes
    free_gb = free / (2**30)
    
    print(f"Current Available Drive Storage: {free_gb:.2f} GB")
    
    if free_gb < minimum_gb:
        # Trigger an administrative system modal notification box alert
        warning_msg = f"CRITICAL: Available drive space has dropped to {free_gb:.2f} GB!"
        ctypes.windll.user32.MessageBoxW(0, warning_msg, "Low Storage Warning", 0x30)
    else:
        print("System storage health check passed successfully.")

if __name__ == "__main__":
    # Run audit and set threshold alert limit to 10 Gigabytes
    check_disk_space(minimum_gb=10)

Step 2: Execution Controls

Save this script file layout on your desktop as storage_guard.py. Run it from your elevated terminal terminal windows engine interface by executing:

python storage_guard.py