Genuine OEM Brother MFC-8820DN Toners
For the MFC-8820DN, TN-530 handles black toner and TN-560 provides high-yield capacity. DR-500 is the printer's separate imaging drum, so it answers a different maintenance message.
Toner Buzz lists genuine Brother choices for both toner capacities and the DR-500 drum. Match the supply type to the printer's message, then choose TN-530 or TN-560 according to your printing volume.