FileSonic has removed the ability to share files with others via the service following the closure of

"All sharing functionality of FileSonic is now disabled. Our service can only be used to upload and retrieve files that you have uploaded personally," a notice on the file-sharing site reads.

Meanwhile, which offers a similar service has disabled access for its US users. Both sites have yet to release official statement on the reduced functionality.

Seven employees of Megaupload Limited and Vestor Limited, including the file-sharing sites' founders; Kim Dotcom, who has previously been known as Kim Schmitz and Kim Tim Jim Vestor, and Mathias Ortmann, were among those arrested and charged for copyright infringement last week. allowed web users to post files to the firm's servers. They would then be given a link to the content, which included music, videos and pornography, could be distributed and allow other web users to access the files. Megaupload did not allow web users to search for content and instead relied on those that uploaded the files sharing the link themselves.

However, the US Justice Department has estimated had cost copyright holders $500m through illegal file-sharing and had generated $175m in illegal profits through advertising placed on the site. Some 18 domain names associated with the company have been seized by US authorities and subsequently shut down.