As card never worked

I bought the piper computer and we built it and the Sd card doesn’t work? What can we do?

Oh no, that is terrible, what a disappointment. Send a email to hi@playpiper.com and let them know and they will send you a new one.

If you don’t want to wait and have access to a SD card reader and another computer, you can try to reflash the SD card. Just follow the directions at https://support.playpiper.com/hc/en-us/articles/360015280633-I-think-my-SD-Card-is-defective-