> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/s2gw-installation-manual/advanced_use/write_image_to_sd_card.md).

# Write image to SD card

The S2GW is delivered with the Linux OS image and S2GW application already preinstalled on the SD card.

If it is necessary to write the image of Linux OS to a SD card than perform the following steps:

1. Connect the SD card reader to PC.
2. Take a new/empty 4GB or bigger SD card and put it in the card reader.
3. Start WinDiskImager.

![](/files/o3Oc6LwTrY2yUjBiQjsb)

4. Click the blue directory icon and select the image file
5. Select the device which is the SD card that will be used to burn the image to.
6. Click “Write” to burn the image to the SD card.
7. After successful burn, remove the SD card from the card reader and place it in the SBC SD card socket.

The card shall be positioned as shown below and pressed full way in

![](/files/JnnASU69o5bQ0IxGOWxk)

![](/files/9zet4uoPFTkQiFuEDN7L)


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