General Dead SD card

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http://androidforums.com – I think the SD card I used in my S3 is dead. Before I buy a new one, does anyone know of anything that might fix it, or at least allow me to recover the data? And assuming it's dead, what type of card do I need. From what I remember when I got this one (dumb thing is less than an year old), was it a class 4? (General)