# Configure a virtual file system

Once the VFS has been created, you can proceed with its configuration to make it usable within Data Mover.

To access the configuration area, click the **3‑dot menu** in the VFS results list and select **Edit**.

The **Virtual File System details** page opens with useful information on its top bar:

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The top bar displays:

* **VFS Name** and **Description**
* **Partner**
* **Storage Class**
* **Retention Class**
* **ACL status**, indicated by the padlock icon:
  * **Open padlock** → ACL unmanaged: all users and groups can access the VFS
  * **Closed padlock** → ACL managed: access is restricted and must be assigned

To update the **Description**, **Storage Class**, **Retention Class**, **Partner**, or **Group**, click the **pencil icon** in the header.

{% hint style="danger" %}
ACL settings **cannot** be modified after the VFS is created.
{% endhint %}

Configuration of a VFS typically involves two main steps:

* Setting access permissions through [ACLs](https://docs.primeur.com/data-mover-1.20/virtual-file-systems/configure-a-virtual-file-system/configure-acls).
* Defining the folder structure by [adding virtual paths](https://docs.primeur.com/data-mover-1.20/virtual-file-systems/configure-a-virtual-file-system/add-virtual-paths).