Sync.com - Sync. com offers a backup tool and a file sharing service, rolled into one.

iCloud - iCloud is cloud service done right. It stores your music, photos, apps, calendars, documents, and more. And wirelessly pushes them to all your devices.

Zoho WorkDrive - File storage & content collaboration tool for modern teams

Google Drive - Access and sync your files anywhere

Yandex.Disk - Files on Yandex.Disk won't get lost if your phone or computer breaks.

Tresorit - Encrypted cloud storage for your confidential files. Using Tresorit, files are encrypted before being uploaded to the cloud. Start encrypting files for free.