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.
Dropbox - Online Sync and File Sharing
Digify - Secure yet simple to use, Digify is the easiest way to track and protect confidential and...
Google Drive - Access and sync your files anywhere
Drooms - Virtual data room software
Mega - Secure File Storage and collaboration
Timeref.net - Try Timeref, Digital Vault & Data Room combinaison to secure your sensitive documents. 15 free days - Certified AFNOF NF203 Software