# Mode Configuration
{% hint style="warning" %}
Ensure that your disk drive is properly initialized before proceeding. [Drive Setup Guide](/bootable-virtual-drive/drive-setup.md)
{% endhint %}
***
### 🛠️ How to Enter Mode Setting
1. Press the **`Menu`** (or **`*`**) button.
2. Navigate to and select **\[Mode setting]**.
| | |
| :------------------------------: | :------------------------------: |
|  |  |
***
### 📑 Item Descriptions
| Item | Description |
| ------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **HDD** | The internal physical drive of the ST400/LK100/MINI PRO. |
| **ODD** | Virtual Optical Disc Drive (CD/DVD/Blu-ray) used for mounting ISO files.
Note: ODD is always write-protected; manual toggle does not apply.
|
| **VHD** | Virtual drive used for mounting **VHD/IMA/RMD** files. It can act as a removable/fixed drive or a USB memory stick. |
***
### ⌨️ Mode Setting Controls
| Key | Function | Description |
| :-----------: | ----------------- | -------------------------------------------------------------------------- |
| **`2` / `8`** | **Move Cursor** | Moves the cursor (▶) **Up** and **Down** to select a drive. |
| **`3` / `9`** | **Change Order** | Moves the selected item's **priority order** (▶) Up and Down. |
| **`5`** | **Write Protect** | Toggles **Write Protection** (On/Off) for the selected drive. |
| **`6`** | **Drive Type** | Toggles the selected drive's property between **Fixed** and **Removable**. |
{% hint style="warning" %}
**Disabling Items:** Items placed below the **\[----------Disable-----]** line will be deactivated. Use the **`3`** or **`9`** keys to move unwanted items below this line.
{% endhint %}
***
### 💻 Configuration Example
If configured as shown in the image above, the PC will recognize the following devices:
1. **Physical HDD**
2. **Virtual ODD Drive**
3. **Removable Writable USB Drive**
***
{% hint style="warning" %}
**Error: \[No Extra Devices]** If you attempt to mount an ISO or VHD file and receive this message, it means no virtual drive (ODD/VHD) is currently active. **At least one virtual drive must be enabled in the Mode Setting menu.**
{% endhint %}
***
### ✅ Saving and Next Steps
Once you have finished your configuration, press the **`Menu`** (**`*`**) key to **save**. The IODD will automatically reconnect, and your new settings will be applied.
* **To mount an ISO file:** Proceed to [Virtual ODD (ISO) Guide](/bootable-virtual-drive/virtual-odd-iso.md).
* **To use Virtual USB/HDD:** Learn how to [Create VHD files with VHD Tools](/bootable-virtual-drive/virtual-drive-vhd/create-vhd-file-with-vhd-tools.md).
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