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
XperienCentral - XperienCentral is an open API content management solution that allows you to add, edit or remove content without having to touch a line of code.
Google Drive - Access and sync your files anywhere
dotCMS Cloud - dotCMS Cloud is a Hybrid Content Management System that delivers enterprise-class web content management, simple website creation, and collaboration for agencies, teams, and small and medium-sized businesses.
Mega - Secure File Storage and collaboration
Sitecore Experience Manager (XM) - Sitecore Experience Manager (XM) is a powerful content management system for organizing and publishing digital information.