# `GET /backup/{id}/vfs`

Protected. Requires a valid session cookie (`credentials: 'include'`).

List VFS files in a backup

Lists all virtual filesystem (VFS) files stored for the authorized company inside a specific backup archive.

## Path parameters

| Param | Required | Type | Description |
|-------|----------|------|-------------|
| `id` | yes | string | Backup identifier (e.g. backup-2026-10-14_02-00-00, backup-2026-10-14, backup-2026-10) |

## Query parameters

| Param | Required | Type | Description |
|-------|----------|------|-------------|
| `companyId` | no | integer | Optional company ID to inspect (defaults to user's selected company) |

## Response `200`

List of VFS files in the backup for the authorized company

```json
{
  "backupId": "…",
  "companyId": 1,
  "files": [
    {
      "name": "…",
      "size": 1,
      "mime": "…",
      "mtime": "2026-08-10T00:00:00.000Z"
    }
  ]
}
```

## Errors

| Status | Description |
|--------|-------------|
| 400 | No company selected or invalid companyId — `{"error":"…"}` |
| 403 | Not authorized for the requested company — `{"error":"…"}` |
| 404 | Backup or VFS archive not found — `{"error":"…"}` |
| 500 | Internal server error — `{"error":"…"}` |

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