On recommendations from the Tablo site, I purchased a WD Elements 2TB drive. It worked really pretty great for a couple months, and the drive is still fine as far as I can tell. I began having irreconcilable loops of "connecting", and then subsequent to a system reset, got a perpetual "No Hard Disc Connected" message.
Unfortunately, Tablo support says that the drive "is pulling more power than the Tablo's USB ports can provide. Try using a powered USB hub in between your Tablo and hard drive to provide the additional power that is required."
I'm still trying to work through the problem, but I'm not very happy with this explanation. I got that drive specifically because it was recommended by Tablo and so that I wouldn't have to add yet another wall-wart to that particular mess. I don't want to spend another $20 just to make this work under these circumstances.
Has anyone else run into this type of issue?