I purchased a 4TB Toshiba drive for my Bolt OTA/Cable. Toshiba MQ04ABB400R 4TB was the recommended drive. I put the drive in my Bolt, let it build and confirmed it was working when completed. Took it out and attempted to use MFSR formatter so I could "TiVo" format it and use all of the drive but I get this error. My assumption is once I run through this I will have the correct format and will be able to use all of the space on the drive after putting it back in and rebuilding it again. I'm confused by the media regions message as it will not reformat the drive.