file size

Hello there,

I need some help. I got a methode thats checks the size of my dir but only the main.. like C:/ or D:/ or F:/..

But i want when a user select a location like C:/user/thisdir/ that the methode only checks the size of C:/..

So a methode needs to select the first letter orsomthing and check the size of it..

DriveInfo[] allDrives = DriveInfo.GetDrives();

foreach (DriveInfo d in allDrives)
            {
                if (d.Name == GoPro1 || d.Name == GoPro2 || d.Name == GoPro3 || d.Name == GoPro4)
                {
                    verbruik[teller] = ((d.TotalSize - d.TotalFreeSpace) / 1024 / 1024 / 1024 + " GB     | |     VRIJ: " + d.TotalFreeSpace / 1024 / 1024 / 1024 + " GB     | |     TOTAAL: " + d.TotalSize / 1024 / 1024 / 1024 + " GB");
                    teller = teller + 1;
                }
            }

This is what i have but it gives me errors when the user select a subfolder..

Hope you understand it,

Pasibun