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
Kemento - Your life stories captured, forever
Google Drive - Access and sync your files anywhere
PastBook - PastBook is an online service that allows you to create your own beautiful photobooks and share them with friends and family.
Mega - Secure File Storage and collaboration
2016bestnine - Your best nine Instagram pics from 2016