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.
Nextpoint - Nextpoint offers solutions for eDiscovery, evidence exchange, deposition and transcript management.
Dropbox - Online Sync and File Sharing
Exterro - Exterro offer eDiscovery and legal software solutions.
Google Drive - Access and sync your files anywhere
Everlaw - Everlaw is an eDiscovery software for litigation, document review, and analysis.
Mega - Secure File Storage and collaboration