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.
GoodSync - GoodSync provides highly reliable file backup and synchronization for both individuals and businesses.
Dropbox - Online Sync and File Sharing
rsync - rsync is a file transfer program for Unix systems. rsync uses the "rsync algorithm" which provides a very fast method for bringing remote files into sync.
Google Drive - Access and sync your files anywhere
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
Mega - Secure File Storage and collaboration