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
Orna - Orna is cloud-based software designed specifically for the private security industry with integrated solutions for dispatchers, mobile responders, and administrators.
Google Drive - Access and sync your files anywhere
Versaterm RMS - Versaterm empowers Public Safety Agencies with a full suite of integrated modules and configurable solutions.
Mega - Secure File Storage and collaboration
CityReporter - CityReporter is an inspection application that works on mobile devices and contains modules to handle the different needs of building permit inspections, playground safety, etc.