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.
iCompaas - Cloud infrastructure Compliance, CyberSecurity and Cost Saving as-a-Service
Dropbox - Online Sync and File Sharing
The Security Checklist - The Practical Security Checklist for Web Developers
Google Drive - Access and sync your files anywhere
Gold Fig - Version control for settings pages
Mega - Secure File Storage and collaboration