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.
LogikCull - Logikcull is a discovery automation platform that helps expedite and lower the cost of litigations & investigations.
Dropbox - Online Sync and File Sharing
Everlaw - Everlaw is an eDiscovery software for litigation, document review, and analysis.
Google Drive - Access and sync your files anywhere
Exterro - Exterro offer eDiscovery and legal software solutions.
Mega - Secure File Storage and collaboration