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.
Microsoft Cloud App Security - Microsoft Cloud App Security provides deeper visibility, comprehensive controls, and enhanced protection against cloud security issues.
Dropbox - Online Sync and File Sharing
Perimeter 81 - Simplify secure network, cloud and application access. Perimeter 81’s zero trust Secure Network as a Service and Software-Defined Perimeter technology provide the simplest and highest level of security, for companies of all sizes.
Google Drive - Access and sync your files anywhere
Oracle CASB Cloud - The Oracle CASB Cloud Service is the only Cloud Access Security Broker (CASB) that gives you both visibility into your entire cloud stack and the security automation tool your IT team needs.
Mega - Secure File Storage and collaboration