I just upgraded to a VMS1100 STB. Looks like it does not recognize my eSATA which worked with my older STB (some kind of Cisco, maybe Cisco 435).
There's an eSATA port on the back and I found a manual online which says the box will support it. I go into the diagnostics on the box and it sees it... but apparently Verizon does not allow it.
I found an older thread discussing this very issue but it is locked. I held on to my old STB for as long as possible so I am kinda late to the game on this topic.