I am looking to purchase a hebrewbooks hard drive (It may very well come handy here!).
Does anyone know where can I buy it online? (eichlers, etc.)
I just had a nice long chat on their website with Chaim Rosenberg, the director The Society for the Preservation of Hebrew Books. He said they are currently working on a new HebrewBooks drive, that should be available soon. So apparently, there is none available now. He was not sure if the new one would be on-site or in-stores.
Based on that, I'd say it'll be available in six to eight weeks.
I found this ad on a blog from last year. The links he posts to buy online are dead, but I would use the contact info on the ad to try and get ahold of it from them directly. This old post from a different blog says to either contact them directly or go to a certain set of seforim stores in NY. That being said, this seems like a lot of money to shell out for something you can get the equivalent of for free online (seforim blog says it costs $300), so I'd only get it if you truly need the whole library offline.