A system includes a data management server and a data store. The data store uses an external file system to store data block of a client virtual machine. The client virtual machine uses an internal file system. The data management server comprises a proxy agent and a staging virtual machine. In response to receiving a request to retrieve a file indexed by the client virtual machine, the proxy agent imports data of the internal file system to a staging virtual machine. The proxy agent determines an internal file address that corresponds to the requested file. The staging virtual machine translates the internal file address to an external file address of the external file system. The staging virtual machine retrieves the file stored in the data store based on the external file address. The staging virtual machine provides the retrieved file to the target device.