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.
Envoy - Visitor registration that's changing how guests are greeted in companies around the world.
Dropbox - Online Sync and File Sharing
TractionGuest - Safe, secure workplace for all.
Google Drive - Access and sync your files anywhere
The Receptionist - The Receptionost is a visitor managemnt solution that has visitor logging system to track visitor traffic.
Mega - Secure File Storage and collaboration