FileSonic - one of the net's highest-profile digital locker services - has abruptly halted its file sharing service.
"All sharing functionality on FileSonic is now disabled. Our service can only be used to upload and retrieve files that you have uploaded personally," reads a notice on the company's website.
While there's no explanation as to why, the obvious assumption is that the move is a response to the arrest of executives at megaupload.com on charges of copyright infringement, and the shutting of the site.
FileSonic's one of the largest digital locker providers, claiming a quarter of a billion page views per month.
In December, it made a move to protect itself from copyright infringement charges by announcing that it was teaming up with Vobile, using the company's vCloud9 to check all files uploaded to its site for copyright infringement before they could be shared - including compressed files.
It's now decided, presumably, that this gives insufficient protection.
Meanwhile, Uploaded.to has cut access to its service altogether for users from the US, although not those elsewhere.
Unlike Megaupload, the two companies don't appear to have any servers within the US, and if that's truly the case, then they should in theory be safe from prosecution - for the time being.
The infamous SOPA and PIPA bills currently under discussion in the US could change all that, with the bills specifically giving the US government the power to go after foreign sites.