Oh ok, I got a new card from a retail store, associate of mine formatted it,still didn't work
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As others have noted..... a new (or newly formatted) card will not work in your scanner until you use Sentinel's "Clear User Data" utility.
Put the new card in your scanner, connect your scanner to your computer in "Mass Storage" mode, run Sentinel's "clear user data" function and check the box that says "display all drives" when that function starts, then click "Ok". When the process finishes, disconnect the USB cable and the scanner will re-boot.
You may need to connect your scanner to the computer with the USB cable while the scanner is
OFF... after connecting the cable to the scanner and computer, turn the scanner ON to go into "Mass Storage" mode.