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.
Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.
Dropbox - Online Sync and File Sharing
Amazon CloudWatch - Amazon CloudWatch is a monitoring service for AWS cloud resources and the applications you run on AWS.
Google Drive - Access and sync your files anywhere
Google Cloud Platform Security Overview - Cloud Workload Protection Platforms
Mega - Secure File Storage and collaboration