> ## Documentation Index
> Fetch the complete documentation index at: https://3to1go.docs.thesteau.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Multiple folders and drives

> Let one Edge back up folders from several locations or drives.

Edge can only see folders that Docker mounts beneath `/scan` inside the container. To back up more than one location, add one volume entry per folder. Your files stay where they are on your computer, including on other drives.

Each entry has the form:

```text theme={null}
"folder on your computer:folder inside Edge"
```

For example, `"D:/Projects:/scan/projects"` makes `D:\Projects` appear as `/scan/projects` in Edge. Use forward slashes in Compose, including for Windows paths.

## Set it up

<Steps>
  <Step title="Open docker-compose.yml">
    Find the `volumes:` section under the `edge` service.
  </Step>

  <Step title="Replace the single-folder entry">
    Remove this line:

    ```yaml theme={null}
          - ${SCAN_DIR:-./scan}:/scan
    ```

    and add one entry per folder in its place. Give each a different name under `/scan`:

    ```yaml docker-compose.yml theme={null}
        volumes:
          - ./config:/config
          - ./hook-scripts:/hook-scripts
          - "C:/Users/Alice:/scan/main"
          - "D:/Projects:/scan/projects"
          - ./state:/data/state
          - ./spool:/data/spool
    ```

    Keep the other volume entries unchanged. The example Compose file includes these lines as comments; remove the `#` to activate them.

    On Linux, use paths such as `"/home/alice:/scan/main"` and `"/mnt/data/projects:/scan/projects"`.
  </Step>

  <Step title="Update .env">
    Remove `SCAN_DIR` from `.env`, since the entries above now name the folders directly. If you set `SCAN_ROOT`, keep it at `/scan`.
  </Step>

  <Step title="Recreate the container">
    From the folder with the Compose file:

    ```sh theme={null}
    docker compose up -d --force-recreate edge
    ```
  </Step>

  <Step title="Choose what to back up">
    Refresh Edge's UI. The folder browser now shows:

    ```text theme={null}
    /scan
      main       (C:\Users\Alice on your computer)
      projects   (D:\Projects on your computer)
    ```

    Create jobs for the folders you want. See [Backup jobs](/edge/backup-jobs).
  </Step>
</Steps>

<Warning>
  Don't make `/scan` itself a job. It would become one combined job covering every mounted folder.
</Warning>

## Add another drive later

Add another line to the same `volumes` section, recreate the container, refresh Edge, and create a job for the new folder:

```yaml theme={null}
      - "E:/Photos:/scan/photos"
```

Adding a volume only makes a folder **visible**. It isn't backed up until you create a job for it.

## Things to know

* **Job names must be unique across all mounted folders.** The `main` and `projects` labels don't separate same-named jobs on Central, so use names like `main-photos` and `projects-photos`.
* **Mounts need write access** for Edge to save markers and restore files.
* **Max Depth counts the extra level.** The `/scan/<name>` folders add one level, so raise **Max Depth** in settings if your markers are deep.
* **Moving an existing folder under a new mount?** Keep its job name so it continues its history on Central. Edge's local state is keyed by path, so the next scan may upload it again.

These steps also apply to the development Compose file in `edge/`. Adding mounts does not require a Central storage migration: snapshots remain organized by `edge_id/edge_instance_id/job_name`.