If you have an existing EFS that’s unencrypted, you can encrypt it be creating a snapshot using AWS Backup, and then restoring the file system to a new EFS with encryption. If you choose to restore in a directory in the same file system, it will not be encrypted. It has to be a new EFS. In addition, you’ll be asked to select which encryption key to use. The default key will work, unless you have your own.
I'm Ulysses, a Cloud Engineer at Cardinal Health based in Columbus, Ohio. I’m a certified AWS Solutions Architect. This website is my way of documenting the things I've learned about the Cloud. When off the grid, I enjoy riding my electric skateboard. I've surfed, snowboarded and played saxophone in the past. I hope you find this site helpful. It's powered by WordPress and hosted in AWS.