US prosecutors have said that data belonging to Megaupload users and stored by third parties could be deleted as soon as Thursday.
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.
Mr Rothken said that freezing of Megaupload’s funds meant it was unable to pay those who were storing its data.





