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# Why is it necessary to update the firmware using a MicroSD card?

Articles on: [Keystone Hardware Wallet](/en/category/keystone-hardware-wallet-1lktmxy/)

Executing firmware updates via a SD card is more secure because it reduces the risk of online attacks. The SD card is a physical device that is not connected to the internet, making it less vulnerable to hacking.  
  
In contrast, methods such as Bluetooth rely on wireless communication and are more susceptible to interception or spoofing. Studies have also shown that hardware wallets which use SD cards for updates have a lower count of security breaches compared to those that use other methods.

Updated on: 17/02/2023