# Creating Bootable SD Card with Gateway Firmware
To prepare your bootable card you will require:
8 GB or bigger size SD card
SD card reader
Mac or PC with fast Internet connection
# Windows/Mac/Linux Update
Download firmware image to your computer. The lastest version of Gateway firmware you can find on https://fw.enapter.com website.
Download and install Balena Etcher application which is used to write image to SD card from https://www.balena.io/etcher/ website.
Start Etcher application
Select firmware file
Plug the SD card into your card reader. At this step Etcher will automatically recognize your card. If you have several SD cards connected - don't forget to check you selected the right one.
Flash!button. Please note that at this step all data on your SD card will be destroyed. The flashing process will start - the app may require the administator rights to proced. The process will take some time and depends on speed of your card reader, card and computer.