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
Gplugin - Gplugin creates a totally private cloud infrastructure in 10 minutes without any startup fee or...
Google Drive - Access and sync your files anywhere
Rackspace - More than 100,000 businesses trust Rackspace with their hosting and cloud computing. Get cloud, managed and hybrid hosting all backed by Fanatical Support.
Mega - Secure File Storage and collaboration
Brick FTP - Enterprise-ready file server solution