Its been doing it to me, on my iPhone.. Redirects when I click on links searching things on google. Quite annoying.
Its still adware or malware.
Just google "myfilestore malware" and you will see other forums are getting hit with it too. Its malware. Download malwarebytes if you dont already have it to get rid of the issue.
2011 Mitsubishi Lancer GTS - DD mode
1991 Mitsubishi 3000GT - Many mods to come