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.
Knox - Knox offers easy disk image encryption and comes with a built-in backup service.
Dropbox - Online Sync and File Sharing
Kruptos - Lock and encrypt your photos, movies, files and folders using 256-bit file encryption.
Google Drive - Access and sync your files anywhere
R-Crypto - R-Crypto is smart data security and disk encryption software that allows you to secure your sensitive information via strong encryption.
Mega - Secure File Storage and collaboration