How to Back up Encrypting File System Certificate.(EFS)

If a data in encrypt on your system, you need a way to recover the data in case something happens the encryption key. If your encryption key is lost or damage and you don't have a way to recover the data, then the data is permanently lost. You will also lose data if you store your encryption key on a smart card and the smart key is damage or lost.  So to avoid loss of encrypted data it’s necessary to back to back it up.

1. Open Certificate Manager. If you are prompted for an administrator password or confirmation, type the password or provide confirmation
2. In the left pane, double-click PERSONAL.
4. In the main pane, click the certificate that lists ENCRYPTING FILE SYSTEM under INTENDED PURPOSES. (You might need to scroll to the right to see this.)
If there is more than one EFS certificate, you should back up all of them.
5. Click the ACTION menu, point to ALL TASKS, and then click EXPORT.
6. In the Certificate Export wizard, click NEXT, click YES, EXPORT THE PRIVATE KEY, and then click NEXT.
8. Type the password you want to use, confirm it, and then click NEXT. The export process will create a file to store the certificate.
9. Type a name for the file and the location (include the whole path) or click BROWSE, navigate to a location, type a file name, and then click Save.
10. Click NEXT, and then click FINISH.
NOTE: These steps can't be completed on Window 7 Starter/Home Basic/Home premium.