How do iunflash a HDD i accidentally choose the wrong

is there a way to unlash my hardest accidentally flashed my hard drive external now my computer won’t read it

Hi Israel, so sorry to hear about the accident. Unfortunately there isn’t a way to restore the data after writing over it, but you should be able to reformat the device to be detectable on your machine (assuming its windows). You can follow the documentation here to achieve that: https://github.com/balena-io/etcher/blob/master/docs/USER-DOCUMENTATION.md#recovering-broken-drives