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.
DigitalChalk - Online Training Software and Learning Management System (LMS)
Dropbox - Online Sync and File Sharing
Workplace by Facebook - Connect everyone in your company and turn ideas into action.
Google Drive - Access and sync your files anywhere
Onehub - Onehub helps businesses securely share and control files in the cloud.
Mega - Secure File Storage and collaboration