Mega, a web-based service that lets people upload and store files of any kind, is a sequel to the Megaupload system that was shut down last January.
Police raids on the offices and home of Kim Dotcom led to the closure of Megaupload. The Mega site went online at dawn on Sunday, with Mr Dotcom due to hold a gala at his New Zealand mansion later.
Mr Dotcom has said the new site complies with the law and warned that attempts to take it down would be futile. "This is not some kind of finger to the US government or to Hollywood," he told Reuters on Saturday. "Legally, there's just nothing there that could be used to shut us down. This site is just as legitimate and has the right to exist as Dropbox, Boxnet and other competitors."
Hours after the site was launched, Mr Dotcom tweeted that it had received 250,000 user registrations, although limited server capacity meant Mega was unreachable to many. In a series of earlier tweets Mr Dotcom said every customer would have 50 gigabytes of free storage - far more than is offered by rival services such as Dropbox or Microsoft's SkyDrive.
Source: BBC News
