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.
Livetiles - Intranet solution for small to large businesses
Dropbox - Online Sync and File Sharing
Communifire - Enterprise Social Collaboration Software
Google Drive - Access and sync your files anywhere
Oak Engage - Oak Engage is a digital workplace for enterprises that need to communicate with their workforce. Connect your teams. Engage your people.
Mega - Secure File Storage and collaboration