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.
DocGen - Static website generator
Dropbox - Online Sync and File Sharing
LogicalDOC - A document management system such as LogicalDOC can help your organization better manage business processes and put order in the chaos of documents every day run your business.
Google Drive - Access and sync your files anywhere
openSourceCM - Web-based legal document processing and contract management
Mega - Secure File Storage and collaboration