I can confirm that the DNR202L does recognize a 3TB Seagate Expansion HDD. Seagate sets it up as a MBR disk and if you leave it as it is the DNR format will fail. Need to covert the drive to GPT. Once that is done the format will work but remember to check the NTFS option. I have not tried to see how it records and plays back but IMO its the cheapest option I could find as far as $/storage space.
Want to add on first two attempts to format I left the FAT 32 box as default thinking the DNR will format to its own format. Regardless, Seagate sets up the disk as an MBR disk and in W7 64 bit I only say a 2TB partition. After coverting to GPT it wont even recognize the drive. But Crystal Disk and Partition Magic did. By the way, how would one use such a GPT drive in Windows? Is it even possible?