A decision on whether Megaupload users should get their data back is awaited from a court in the United States.
Customers lost access to data on Megaupload servers when the file-sharing site was shut down in January after co-founder Kim DotCom was arrested in Auckland, New Zealand.
The closure was co-ordinated by US law-enforcement agencies, which said Megaupload had violated copyright law.
Megaupload was indicted in a federal court in Alexandria, Virginia, on 19 January and the site was then shut down.
The court case is being brought by the Electronic Frontier Foundation, acting on behalf of Megaupload user Kyle Goodwin, who makes a living filming high school sports events in Ohio.
The foundation said a hard-drive failure meant he needed to get at his stored footage.