Resplus C-20A Silence Beeping

Had this machine for about a week. Its super simple (and cheap ) and doesn't have cell or wifi connection. Just a micro SD card to record data. However, after a week, the 8gb SD card filled up. And now, every time I start it up, the damn machine alerts me that the card is full, with the most annoying beep. I removed the SD card thinking it would solve the issue. Only now it beeps multiple times, warning me there is no SD card installed. I don't need anything recorded and, while the beep is annoying to me, I could live with it. The issue is it sets my dog off into full terror/panic mode. Does anyone know how to mute or disable the beeping permanently? It is really causing issues with my sleep. Manual only states how to disable mask leak alarm. Any help would be greatly appreciated. Thanks.

Go out the door when you need to, to keep your dog sane.

Spend $10 for a card and stop the beeping.

Buy a new card or delete the data on the existing one.