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The D3300 page on Nikon's Download Center includes instructions for checking your current firmware version and installing the new firmware as well as the firmware download. Go to http://downloadcenter.nikonimglib.com/en/products/21/D3300.html , then click on the 'Firmware' tab. Click the 'View download page' link for the D3300 Firmware to go to the download page for the current firmware. Once on the download page, click the plus sign to the left of 'Updating the Camera Firmware' to view the instructions. For assistance please contact Nikon Support at 1-800-NikonUS.
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