Dotcom said the Coatesville mansion was "a very modern house" which had a server room which was used to control entertainment devices, security cameras and other home systems. The server room included a video editing suite and 10 years worth of home video footage, approximately 350 hours in total, which was stored on two servers.

As well as these servers, Dotcom said numerous personal laptop and desktop computers were seized. He said that being denied access to this data had started to cause a "big problem" when he had been asked about his financial status during bail hearings, and he had gone to "great lengths" to obtain the information by other means.

"Right now we don't have access to the data that allows us to prepare for the extradition case," Dotcom said.

Dotcom said the seized data also included many emails and audio recordings of conversations he had with large content providing companies that would be "very revealing" if he had access to them.

Crown lawyer John Pike, cross-examining Dotcom on behalf of the Attorney General, asked Dotcom to explain a handwritten note that was found in the gatehouse of the Coatesville property that read: "Do not let police in -- tell Wayne."