I solved the formatting problem in my SD card following steps here:
1. Go to Disk Management.(Right click the My Computer icon and select the item Manage)
2. The flash drive is listed at the bottom of the Windows. Right it and select New Simple Volume. Then follow the wizard.
3. The the drive will be formatted.
if the Disk Management can't help, you should format it with Command Prompt. It's still easy to format it with cmmand line.
I solved the formatting problem in my SD card following steps here:
1. click Start button and type cmd in the search both and press Enter
2. Type command diskpart on the black windows and press Enter key
3. Continue typing disk 4 Type create primary partition and hit Enter
4. type in Command prompt format /FS:FAT32J
for more detailed information with screenshots visit this link -