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.
Hubdoc - Hubdoc gets your key financial docs in one place, automatically.
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