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Help Samsung Galaxy Y performing slow after upgraded the SD card with 8gb

try this, maybe it'll help. first connect your SD to your computer via any card reader or usb and when the computer detected the SD, right click it and choose properties and pick TOOLS and do defragmentation and error checking, afterwards put back the SD to you galaxy y and see if it works. I have done this on my SD and works faster than before, if it says "unknown format of card" just simply connect again your SD to your PC and open it before putting it back on your phone again, that should be all.
 
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