Although I could be wrong, I would think that a special connection would only be required if it were part of a whole-home PVR setup (Joey, Hopper). If it's simply another receiver, I don't see the need for anything special.
No. See the following thread:Is there any way to transfer recordings from a 9400 to a 9500? (is it possible with an external hard drive?)
This could be "media shrink". It was introduced on Rogers in 2014 and discussed recently in BellMTS, see link below:Has anyone noticed an increase in hard drive space lately?
The 7500 has no tuners. I suggest you read through some of the recent posts in this thread. The 7500 communicates with the 9500 (which has two tuners) and the 7500 can view recordings or live, depending on what the 9500 is doing. I don't have Bell Sat.Is the 7500 a 2-receiver machine?
No, the 7500 is just a box that communicates with the 9500, which is a two tuner PVR.So the 7500 is just a PVR and the 9500 is just a receiver.