What is file system of WD TV Hub´s HDD?
Honestly, I do not know, There could be some additional paritions that WD keeps which is generally not visible when mounted on a PC.
Some user by name 81supporterreported that Internal 1 TB HDD has 2 partitions.
WDTVLiveHub 952769MB <<< NTFS???
and
WDTVPriv 964MB (Hidden)
See the posting here:
http://community.wdc.com/t5/WD-TV-Live-Hub-General/Opening-the-hub/td-p/89463/page/3
With one software I have found 3 partitions
one is recognized with 3 NTFS systems
other two were unrecognized
scanning with other software right now
I have deleted videos from my sons 1st birthday
I need to recover it