At the moment we do not have a date from the purchasing team as to when that model of hard-drive is going to becoming back into stock.
In regards to your question regarding drive setup, partitions and whatnot. It's really down to personal preferences. Some people like to get a big drive and split that so they can have OS on 1 partition, Music and photo's on another partition and then there are those like myself who have all sorts of weird and wonderful drive combinations for various data types and usages.
As for the NAS question. At the moment the netgear are popular due to the free drive offer (which ends on the
30th SEPT so hurry it's not on for long!) and these can be seen at the following link ;
http://www.scan.co.uk/Products/Netge...AS-(Empty-Case)
I myself use a synology NAS storage device and this is also very good and is able to download various files, download torrents and run various servers on it so that I can stream and play with stuff at home.
Best Regards,