What are some alternatives?
Dropbox - Online Sync and File Sharing
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
ShareFile - Secure file sharing and sync
Mega - Secure File Storage and collaboration
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
Google Cloud Storage - Google Cloud Storage offers developers and IT organizations durable and highly available object storage.