Add drive space check

[ThadHouse]

            try
            {
                var rootDirectory = Directory.GetDirectoryRoot(Environment.GetFolderPath(Environment.SpecialFolder.Personal));

                var driveInfo = new DriveInfo(rootDirectory);

                if (driveInfo.AvailableFreeSpace < 3L * 1000L * 1000L * 1000L)
                {
                    ;
                    // Fail
                }
            }
            catch
            {
                // Do nothing if we couldn't determine the drive
            }

In theory, this might work on unix platforms as well.