Read this and answer the question. If the question is unanswerable, say "unanswerable".

The console was originally planned for a global release through November, but at the start of September the release in Europe and the rest of the world was delayed until March. With it being a somewhat last-minute delay, some companies had taken deposits for pre-orders, at which Sony informed customers that they were eligible for full refunds or could continue the pre-order. On January 24, 2007, Sony announced that PlayStation 3 would go on sale on March 23, 2007, in Europe, Australia, the Middle East, Africa and New Zealand. The system sold about 600,000 units in its first two days. On March 7, 2007, the 60 GB PlayStation 3 launched in Singapore with a price of S$799. The console was launched in South Korea on June 16, 2007, as a single version equipped with an 80 GB hard drive and IPTV.

How big was the hard drive in the single North Korean version?
unanswerable