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.
Fitbod - Personalized Strength-Training powered by Machine Learning
Dropbox - Online Sync and File Sharing
MyFitnessPal - Track the number of calories that you consume each day with MyFitnessPal. The app also lets you create a diet and track the exercise that you complete each day whether it's walking, running or some other type of program.
Google Drive - Access and sync your files anywhere
Fitocracy - Fitocracy is a social network that turns exercise into a cooperative and competitive exercise with friends, rivals, and strangers.
Mega - Secure File Storage and collaboration