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
WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Google Drive - Access and sync your files anywhere
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
Mega - Secure File Storage and collaboration
Google Forms - Simple web forms from Google.