How to Write to SD Card - Linux Mint Ubuntu

I was trying to write an image to an SD card but Linux Mint showed padlocks on every file and folder. It would not let me write.

After some research, I used the following command and it unlocked the card for me. It's best to execute this command moments after you insert the card. Otherwise it won't work:

sudo chown 1000:1000 /media/28C9-C95B

1000/1000 are my user group ids. The last part is where the system auto-mounted the SD card to.