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.
N2WS Cloud Protection Manager - N2WS is the leading Enterprise-class disaster recovery, and backup solution specifically made for Amazon EC2 servers.
Dropbox - Online Sync and File Sharing
CloudEndure - CloudEndure provides cloud migration and cloud disaster recovery for any application.
Google Drive - Access and sync your files anywhere
Easeus Disk Copy - EaseUS is a suite of data recovery and protection software designed to bring back files that have been lost, destroyed or accidentally deleted and protect existing files from suffering the same fate.
Mega - Secure File Storage and collaboration