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.
Cerner CareTracker - Healthcare Analytics
Dropbox - Online Sync and File Sharing
UpToDate - UpToDate, the evidence-based clinical decision support resource from Wolters Kluwer, is trusted at the point of care by clinicians worldwide.
Google Drive - Access and sync your files anywhere
CareCloud - Innovative cloud-based practice management and EHR software, revenue cycle management and patient engagement. See what CareCloud can do for your practice.
Mega - Secure File Storage and collaboration