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
XShare - XShare – File Fast Transfer developed and published by Shalltry Groups.
Google Drive - Access and sync your files anywhere
Zapya - Zaypa is a cross-platform transferring and sharing!
Mega - Secure File Storage and collaboration
Send Anywhere - Send whatever you want, wherever you want