Sync.com - Sync. com offers a backup tool and a file sharing service, rolled into one.
Yandex.Disk - Files on Yandex.Disk won't get lost if your phone or computer breaks.
Zoho WorkDrive - File storage & content collaboration tool for modern teams
CloudBerry Box - CloudBerry Box provides bi-directional synchronization of data across remote computers.
kDrive - The most privacy-friendly online storage and file sync service. From 2 TB, hosted in Switzerland.
Cloudu - Secure German online storage and file sync service. Apps for all major platforms.