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
Idea Paint - Create a usable, interactive space on any flat surface
Google Drive - Access and sync your files anywhere
Walls360 - Amazing wall graphics
Mega - Secure File Storage and collaboration
Microsoft Whiteboard - The canvas where ideas, content, & people come together.