I have an Alcatel Pixi 4 with a 32Gb Sandisk sd card in it that worked fine. I removed the card (while it was turned off) and put in another 'identical' card to test it. Then powered down and replaced my original card. It now doesn't work. Tells me it's an unsupported card and needs to be formatted. I don't want to reformat as it has data on it I don't want to lose. Help! This driving me nutso!