For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
ProBinder - ProBinder is your secured online teamwork platform to manage all of your work simply and securely.
Dropbox - Online Sync and File Sharing
Collanos - Collanos Workplace is a proprietary teamwork software that ceased development in 2010.
Google Drive - Access and sync your files anywhere
Projectfusion - Projectfusion is a virtual data room system that offers enterprises a single and centralized platform from which to set up data rooms, manage projects, collaborate and perform file sharing securely.
Mega - Secure File Storage and collaboration