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.
Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
Dropbox - Online Sync and File Sharing
Macrium Reflect - Macrium Software - the creators of Macrium Reflect backup, imaging and cloning software.
Google Drive - Access and sync your files anywhere
AOMEI Backupper - AOMEI Backupper is a software created to help a person backup, restore, clone, and sync their entire Windows system.
Mega - Secure File Storage and collaboration