How to Write a ZIPped ISO to an SD Card with Rufus 1. Download the ZIP file and save it to your computer. 2. Extract the ZIP archive so you can access the `.iso` file inside. 3. Insert the SD card into your card reader. 4. Open Rufus. 5. In Rufus, select your SD card under Device. 6. Click SELECT and choose the `.iso` file you extracted. 7. Leave the default image mode if Rufus recommends it. 8. Check that the correct SD card is selected. This step will erase all data on it. 9. Click START. 10. If Rufus asks whether to use ISO mode or DD mode, choose the recommended option. 11. Wait for the process to finish and safely eject the SD card.