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
Evidence Recorder - MapScenes Systems: Software for accident and crime scene reconstruction and animation. Evidence collection and diagramming software.