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.
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
Dropbox - Online Sync and File Sharing
Symantec Data Loss Prevention - Fully protect your data with the comprehensive detection technologies and unified policies of Symantec's industry leading Data Loss Prevention (DLP).
Google Drive - Access and sync your files anywhere
Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
Mega - Secure File Storage and collaboration