Write only usb drive using windows permission

public void writeOnlyDirectory(string storageLocation)
{
    string User = System.Environment.UserName.ToString();
    string drive = storageLocation.Substring(0, 3);        

    DirectoryInfo myDirectoryInfo = new DirectoryInfo(drive);
    DirectorySecurity sec = Directory.GetAccessControl(myDirectoryInfo.ToString());
    SecurityIdentifier Everyone = new SecurityIdentifier(WellKnownSidType.WorldSid, null);

    sec.RemoveAccessRuleAll(new FileSystemAccessRule(Everyone, FileSystemRights.FullControl, AccessControlType.Allow));
            
//Give current user full rights
    sec.AddAccessRule(new FileSystemAccessRule(User, FileSystemRights.FullControl | FileSystemRights.Synchronize, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None, AccessControlType.Allow));
            
    sec.AddAccessRule(new FileSystemAccessRule(Everyone, FileSystemRights.Write | FileSystemRights.ListDirectory, InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None, AccessControlType.Allow));
            
    try
      {
          Directory.SetAccessControl(myDirectoryInfo.ToString(), sec);
          MessageBox.Show("Permissions Altered Successfully");
      }
    catch (PrivilegeNotHeldException ex)
      {
          MessageBox.Show(ex.Message);
      }
}