Zend certified PHP/Magento developer

How to wipe all data of an Micro SD card which is in Read Only?

My SD card got fried and now I want to return it since it wasn’t too long ago I bought it. On the card is my Raspberry PI system. I’m a little bit uncomfortable with giving the store the SD card with all the data on it. But I can not erase my data because the card is in “read only mode”.

Is there a way to wipe all the data on it without destroying it?