Get a Multimedia card reader for yourself. Plugin in the card reader in computer and insert the SD card in it. Once you see the SD Card in My computer that means your card reader is able to read the SD card that you have inserted. You can right click on the icon and click format. Do a quick format and choose file system as FAT32.
or
You can use SD Card Formatter and can follow their manual. I think that will also work for you.
http://www.sdcard.org/consumers/formatter_3/
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