Google Drive - Access and sync your files anywhere
Sync.com - Sync. com offers a backup tool and a file sharing service, rolled into one.
Dropbox - Online Sync and File Sharing
Yandex.Disk - Files on Yandex.Disk won't get lost if your phone or computer breaks.
ShareFile - Secure file sharing and sync
Zoho WorkDrive - File storage & content collaboration tool for modern teams