Vu+ solo 2 connect internal 2.5" hdd

Vu+ solo 2 with ViX software... I want to connect a 2.5" hdd inside. My questions are:

(1) Do I have to format the hdd in my PC first, or not?

(2) If I do have to format it, what do I use, FAT32 or NTFS?

(3) Can it be a SDD drive?

(4) What's the Min and Max capacity I can install? (i.e. 40 Gb to 2 Tb)

Thanks

Probably the most clear cut reply I've gotten to a question of mine, up to now!
THANKS!!!

And as for USB stick for recording:

(1) Can it be inserted to any of the 3 inputs?

(2) When I tried to put a "Timer" to record smg yesterday (without any drive in - just wanted to check how it works) it gave me 3 options:
(a) Descramble & record ECM
(b) Don't descramble & record ECM
(c) Normal

Which one to choose? and what's ECM?

And what format does it record to? If it records on the known (to me) formats like avi, mpg, mp4, etc, then maybe I should not install the HDD in the receiver but in a USD input... that way I will be able to take plug it off any time and watch the recorded program to a PC/laptop?

Thanks

Installed HDD inside, all worked good... formatted in PC (Windows Vista) as ExFAT, installed, turned on, went to Hard Drive, initialized, recorded (as normal... still don't know what the rest means and where it should be).
Still don't know the format of recording...

Also input in back USBs a stick with avi, mkv, etc, movies, but I cannot find it in the MENU to playback... what should I do in order to watch my movies from the USB stick?

Thanks