According to a judgement delivered by Justice Helen Winkelmann today the material to be handed over includes over 10 million intercepted emails, "voluminous financial records obtained from a number of different countries" and more than 150 terabytes of data that was stored on servers seized in New Zealand alone. The judgement refers to the contents of servers rented by Megaupload in the US as being "very large" but according to other reports amount to 25 petabytes.

Dotcom, Finn Batato, Mathias Ortmann and Bram van der Kolk, are awaiting an extradition hearing related to US copyright infringement charges which is due to take place on August 6. All four defendants have denied any wrongdoing.

The US government is seeking a judicial review of an earlier judgement by Judge David Harvey on May 29, which ordered the US to disclose within 21 days "documents and materials relating to the whether the US has a prima facie case" against the Megaupload defendants for the purposes of extradition.

Meanwhile the US applied to remove the effect of the order of May 29.

Crown lawyers acting for the US have argued that the scope of that order "trespasses on the trial procedures of the requesting country." In the US the obligation for prosecutors to provide discovery or disclosure is triggered when a defendant makes their first appearance in a US court.