What is CDNShark Backup?
CDNShark Backup protects folders on your computer by taking snapshots on a schedule and storing them with CDNShark. If a file is deleted, overwritten or ransomed, you restore it from a point in time.
How it works
- You install the desktop app and sign in with your CDNShark email and password. No keys to copy and no repository to create — it is set up for you on first run.
- You choose which folders to protect and how often.
- Files are encrypted on your device before upload, deduplicated and compressed, so a snapshot usually uses far less space than the raw files.
Storage it uses
Backups draw on the storage allowance included with your CDN plan — the same pool shared with CDNShark Storage and Sync.
About the encryption
Your files are encrypted before they leave your computer, so the stored data is not readable to anyone who obtains it on its own. The repository password is generated and held by CDNShark so that your backups stay recoverable if you forget your account password. We therefore do not describe Backup as zero-knowledge. If you need storage that CDNShark genuinely cannot read, use CDNShark Sync with end-to-end encryption.
Backup or Sync?
Backup keeps historical copies you can go back to. Sync keeps one folder identical everywhere. Deleting a file in Sync deletes it everywhere; deleting a file that has been backed up leaves the snapshots intact. Many people use both.