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.
NovaBackup Software - NovaBackup Software is a cloud-based backup software that is intended for the windows system, allowing you to store your files, documents, and much more.
Dropbox - Online Sync and File Sharing
JustCloud - Cloud storage made easy. Just Cloud offers ultimate online storage, syncing and file sharing. JustCloud cloud storage is rated number 1 on many comparison sites. People also askWhat does JustCloud do?How do I get rid of JustCloud?
Google Drive - Access and sync your files anywhere
Nasuni - Nasuni is a solution that unifies primary data storage, offsite disaster recovery, and data backup.
Mega - Secure File Storage and collaboration