Users have been unable to access data since the file-sharing service was raided.
The warning was made in a letter filed by the US Attorney’s Office, the Associated Press news agency reported. Megaupload’s lawyer Ira Rothken told the agency that at least 50 million users had data which could be deleted. Rothken said that freezing of Megaupload’s funds meant it was unable to pay those who were storing its data.
In the letter, prosecutors said that the data which might be deleted was being held by the storage companies Carpathia Hosting and Cogent Communications Group.
Rothken told the agency that he was “cautiously optimistic” that a deal could be done to save the data from being wiped. He said that the data would be needed by the defence.