EKS Pod folder contents overwritten after mounting EFS volume

We have created a deployment in the EKS cluster. Underlying pods are supposed to have existing content inside a particular directory which was created through the Dockerfile copy command. But when the pod is created an external EFS volume is mounted on the same directory path due to some application requirements开发者_开发问答. When we login to the pod and check the contents we found that the existing files have been overwritten by the EFS volume contents. We would like to have both the file contents in place once the EFS volume is mounted on the Pod. Please help us to achieve this.