I was an early adapter and bought one of the first 4-tuner Tablo DVRs. At that time, we were limited to one hard disk with a maximum capacity of 1 TB. My 1 TB Seagate is nearly full with wonderful commercial-free movies (courtesy of my local PBS channel) and memorable special shows that I wish to retain. From some of the aging posts on this forum, I sense that Tablo management has decided that there is no need for a hard drive transition path to either a larger hard disk or to activate the second USB drive to accommodate a second HD. I find this very disappointing. Surely, there are many other early supporters and new users who start out with lower capacity hard drives that fill up as that learn the value of the Tablo system.
I have seen some reference in this forum to a PC-based transfer of recordings from a small HD to a larger HD. As a Mac user, I am unable to try this unsupported approach. Please Tablo, provide a hard disk upgrade transition for your loyal users. I would prefer to transfer my data to a larger hard disk, but I would be very happy to have the second USB jack activated.