How to get complete drive information using C#?

Drive information of an Operating System includes key details about storage drives such as drive name, volume label, free space, total size, drive format, and drive type. In C#, you can retrieve this information using the DriveInfo class from the System.IO namespace.

Syntax

Following is the syntax for creating a DriveInfo object and accessing its properties −

DriveInfo driveInfo = new DriveInfo("DriveLetter");
string name = driveInfo.Name;
long freeSpace = driveInfo.AvailableFreeSpace;
DriveType type = driveInfo.DriveType;

DriveInfo Properties

Getting Information for a Specific Drive

Example

using System;
using System.IO;

class Program {
   static void Main() {
      DriveInfo driveInfo = new DriveInfo("C");
      
      Console.WriteLine("Drive Name: " + driveInfo.Name);
      Console.WriteLine("Volume Label: " + driveInfo.VolumeLabel);
      Console.WriteLine("Available Free Space: " + driveInfo.AvailableFreeSpace + " bytes");
      Console.WriteLine("Total Free Space: " + driveInfo.TotalFreeSpace + " bytes");
      Console.WriteLine("Total Size: " + driveInfo.TotalSize + " bytes");
      Console.WriteLine("Drive Format: " + driveInfo.DriveFormat);
      Console.WriteLine("Drive Type: " + driveInfo.DriveType);
   }
}

The output of the above code is −

Drive Name: C:\
Volume Label: Windows
Available Free Space: 156728492032 bytes
Total Free Space: 156728492032 bytes
Total Size: 255094845440 bytes
Drive Format: NTFS
Drive Type: Fixed

Getting Information for All Available Drives

Example

using System;
using System.IO;

class Program {
   static void Main() {
      DriveInfo[] drives = DriveInfo.GetDrives();
      
      foreach (DriveInfo drive in drives) {
         Console.WriteLine("--- Drive Information ---");
         Console.WriteLine("Name: " + drive.Name);
         Console.WriteLine("Type: " + drive.DriveType);
         
         if (drive.IsReady) {
            Console.WriteLine("Volume Label: " + drive.VolumeLabel);
            Console.WriteLine("Format: " + drive.DriveFormat);
            Console.WriteLine("Total Size: " + (drive.TotalSize / (1024 * 1024 * 1024)) + " GB");
            Console.WriteLine("Free Space: " + (drive.AvailableFreeSpace / (1024 * 1024 * 1024)) + " GB");
         } else {
            Console.WriteLine("Drive is not ready");
         }
         Console.WriteLine();
      }
   }
}

The output of the above code is −

--- Drive Information ---
Name: C:\
Type: Fixed
Volume Label: Windows
Format: NTFS
Total Size: 237 GB
Free Space: 146 GB

--- Drive Information ---
Name: D:\
Type: Fixed
Volume Label: Data
Format: NTFS
Total Size: 931 GB
Free Space: 500 GB

--- Drive Information ---
Name: E:\
Type: Removable
Drive is not ready

Converting Bytes to Human-Readable Format

Example

using System;
using System.IO;

class Program {
   static void Main() {
      DriveInfo drive = new DriveInfo("C");
      
      if (drive.IsReady) {
         Console.WriteLine("Drive: " + drive.Name);
         Console.WriteLine("Total Size: " + FormatBytes(drive.TotalSize));
         Console.WriteLine("Used Space: " + FormatBytes(drive.TotalSize - drive.TotalFreeSpace));
         Console.WriteLine("Free Space: " + FormatBytes(drive.AvailableFreeSpace));
         
         double usagePercent = ((double)(drive.TotalSize - drive.TotalFreeSpace) / drive.TotalSize) * 100;
         Console.WriteLine("Usage: " + usagePercent.ToString("F1") + "%");
      }
   }
   
   static string FormatBytes(long bytes) {
      string[] suffixes = { "B", "KB", "MB", "GB", "TB" };
      int counter = 0;
      double number = bytes;
      
      while (Math.Round(number / 1024) >= 1) {
         number = number / 1024;
         counter++;
      }
      
      return string.Format("{0:n1}{1}", number, suffixes[counter]);
   }
}

The output of the above code is −

Drive: C:\
Total Size: 237.5 GB
Used Space: 91.4 GB
Free Space: 146.1 GB
Usage: 38.5%

Conclusion

The DriveInfo class in C# provides comprehensive information about system drives including space usage, format, and type. Use DriveInfo.GetDrives() to enumerate all drives or create specific DriveInfo instances for targeted drive information. Always check the IsReady property before accessing drive properties to avoid exceptions.