Google Drive - Access and sync your files anywhere
Dropbox - Online Sync and File Sharing
Apple iCloud - iCloud securely and safely stores the photos, videos, documents, apps, and more, helps to keep them updated across all the connected devices.
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
Dropbox Professional - Get 3 TB of storage along with access to Showcase, Smart Sync, document scanning, advanced security features and more with Dropbox Professional.