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.
Dropbox - Online Sync and File Sharing
Microsoft Azure Active Directory - Azure Active Directory is a comprehensive identity and access management cloud solution that provides a robust set of capabilities to manage users and groups and help secure access to applications including Microsoft online services like Office 365 …
Google Drive - Access and sync your files anywhere
WSO2 Identity Server - WSO2 Identity Server efficiently undertakes the complex task of identity management across enterprise applications, services and APIs.
Mega - Secure File Storage and collaboration
oneall - OneAll Social Login is used by more than 250,000 websites worldwide, including small blogs, growing startups and large corporate enterprises.