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.
Unbound - Unbound is a validating, recursive, and caching DNS resolver.
Dropbox - Online Sync and File Sharing
cubeupload - Share images online with zero compression, completely free.
Google Drive - Access and sync your files anywhere
Imgur - Imgur is a free and simple image hosting service with image editing feature. Signup is optional.
Mega - Secure File Storage and collaboration