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.
RevenueWell - RevenueWell provides automated dental practice marketing and patient communications suite for dentists.
Dropbox - Online Sync and File Sharing
Systems for Dentists - Systems for Dentists is a dental practice management software that allows you to configure the software to suite your practice needs.
Google Drive - Access and sync your files anywhere
MedicTalk DentForms - Paperless software for dental offices.
Mega - Secure File Storage and collaboration