TF card (SD card ) unrecognized

I am using a SD to make a linux system based on f1c100s . but i found it failed that it couldn't run .

so i wanted to do it again and there were two partition which i didn't want it .  i needed format this card .

i found a way to format it . 

 

1. on linux system like kali linux , search a tool called "Disks"

2. run it and click the storage card 

3. delete the two partitions we created 

4. and create new one partition