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.
Amazon AWS - Amazon Web Services offers reliable, scalable, and inexpensive cloud computing services. Free to join, pay only for what you use.
Dropbox - Online Sync and File Sharing
IBM Bluemix - IBM Bluemix is an open-standard, cloud-based platform that enables users to build, manage, and run apps on mobile, web, and smart devices.
Google Drive - Access and sync your files anywhere
Microsoft Cloud Platform - Microsoft approaches cloud computing as a way to help customers take a key step toward better business agility, economics, and user experiences.
Mega - Secure File Storage and collaboration