The crackdown by the FBI of Megaupload for copyright infringement, which affected many users who were using the site for legitimate distribution of files, has sparked concerns across the world about reliability of similar cloud computing services.

Users are concerned over the crackdown as there site could be the next in line to be closed down by the authorities, which are actively checking violations online. Some of the leading service providers have tried to convince their users that their services are reliable will not be affected.

Tom Langridge, the corporate communications director at MediaFire wrote on the company' blog that its premium services "are based on a user's ability to upload data and pay to distribute it," and added that non-premium users are limited to 200MB per file. He also said that the service encourages its users to understand its terms of service carefully as the company takes violations very seriously.

Derek Labian, MediaFire's CEO pointed out that the company has a working relationship with the authorities and it has a program in place to comply with takedown requests by copyright holders as per the requirements of the Digital Millennium Copyright Act.

RapidShare also dismissed fears that it might face a shutdown by the US authorities. The company said in a statement on its website that it is different in many issues from Megaupload and is not threatened by a shutdown by the authorities.