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
AuditFile - Cloud-based audit, review, and compilation software.
Google Drive - Access and sync your files anywhere
AdvanceFlow - Financial Audit
Mega - Secure File Storage and collaboration
Worldox GX4 - Worldox creates easy to use document and email management tools for businesses of all sizes. Improve workflow with the best mobility and sharing software