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
RealEye - Online Research Platform with Webcam Eye-Tracking.
Google Drive - Access and sync your files anywhere
SeeSo.io - SeeSo, the real-time eye tracking SDK for the smartphone/tablet/laptop environment. With a users' vision, reach beyond the vision.
Mega - Secure File Storage and collaboration
GazeRecorder - Our technology turns a simple webcam into a Accurate Eye-Tracker. The fast & visual way to understand user behavior. Cloud Eye-Tracking Insights Platform.