OK, sounds like if I format the drive on my PC (any details on what to do or not do in the format?) I can attach, say, a 4T external to my Genie when I get it. One other question: is the speed of operations that access the drive noticeably slower when using the external vs. internal on the Genie? I know it is a completely different setup/functionality but on my Dish DVRs the external USB drive is much slower in terms of viewing the list, deleting, etc. than the built in drives.
You don't need to do any formatting on a PC, the 44 will do that.