Hi! BarryKeane
I'm Marvin an Independent Advisor, and I will help you with your issue.
Try with this
Method 1. Run Diskpart to Format SD Card That Won't Format
Step 1. Press Windows key and R key at the same time, type cmd in the Run box, hit Enter to open the command prompt(cmd.exe).
Step 2. Type diskpart to run Diskpart Utility.
Step 3. Type list disk to list the drives on the computer.
Step 4. Type select disk 1 (The number should be replaced by the exact drive number of your SD card).
Step 5. Type clean to run the clean utility (this will wipe all data on the SD card so make sure you saved a copy or backup of the card data).
Step 6. Type create partition primary to create a new partition on the SD card.
Step 7. Type select partition 1 (it should be the newly created partition on step 6).
Step 8. Type active to make the partition active.
Step 9. Type format fs=ntfs (or format fs=fat32)to format the partition to the desired file system.
If you still having problems with this, I will be around to help you.
Regards.