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
Spotify - Map shows when two people play same song at same time
Google Drive - Access and sync your files anywhere
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Mega - Secure File Storage and collaboration
SoundCloud - Enjoy music & follow favourite artists