Programmatically determine Total Free Space available on your Hard Drive

The DriveInfo.AvailableFreeSpace property indicates the amount of available free space on a drive. Here’s how to use this property to programmatically retrieve the total free space of all logical drives (including CD/DVD drives) on your machine.

C#

static void Main(string[] args)
{
    foreach (DriveInfo drive in DriveInfo.GetDrives())
    {
        try
        {
            Console.WriteLine("{0} has {1} MB free space available",
            drive.RootDirectory, (drive.AvailableFreeSpace / 1024) / 1024);
        }
        catch (IOException io)
        {
            Console.WriteLine(io.Message);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }
    }
    Console.ReadLine();
}

VB.NET

Shared Sub Main(ByVal args() As String)
    For Each drive As DriveInfo In DriveInfo.GetDrives()
        Try
            Console.WriteLine("{0} has {1} MB free space available", _
drive.RootDirectory, (drive.AvailableFreeSpace \ 1024) / 1024)
        Catch io As IOException
            Console.WriteLine(io.Message)
        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try
    Next drive
    Console.ReadLine()
End Sub

OUTPUT