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
Palo Alto Networks GlobalProtect - GlobalProtect extends NGFW protections to your mobile workforce, no matter where they are.
Google Drive - Access and sync your files anywhere
Symantec Endpoint Protection Mobile - Protect your business from malicious mobile attacks on modern operating systems such as Android and iOS.
Mega - Secure File Storage and collaboration
Trend Micro Mobile Security - Trend Micro Mobile Security offers full visibility and control of mobile devices, apps, and data through a single built-in console.