An electronic book reading device that also plays music, the Nook is able to open and display a variety of e-book, music and picture files, including text and Portable Document Format files. The device cannot open a MOBI file directly. Third-party conversion programs can convert a MOBI file that doesn't contain a license, non-Digital Rights Management files, into a format the Nook can process and display.
Supported File Formats
The Nook is able to open and display the following file formats directly: EPUB, PDF, PPS and PPT presentation files; TXT, DOC, DOCM and DOCX document files; XLS, PPSM, XLX, PPTX, XLSM, PPTM, PPSX, JPG, GIF, PNG and BMP image files; and MP3 and MP4 music files. The Nook is not able to open and display the following file formats: LIT, AMZ used on the Amazon Kindle and LRZ/LRX used on the Sony Reader Digital Book.
To convert a MOBI file for use on your Nook, you must complete the conversion using your computer and transfer the converted file to a SecureDigital card for loading into your Nook. Navigate your computer's Internet browser to the "Convert Text to the ePub ebook Format" link (ebook.online-convert.com/convert-to-epub) and click the "Browse" button under the heading "Upload your document you want to convert to EPUB:" or if the MOBI file is stored on a Website or Web server, enter the entire Web address in the box under "Or enter URL of the file you want to convert to EPUB:." Click the down arrow next "Target ebook reader:" and click "Nook." Click the "Convert" button to start the conversion process. Click "Save" or "Save File" when the "Opening XXXXX.epub" dialog box appears -- with the "XXXXX's" representing the file's specific name. The converter automatically changes the file into a EPUB file for use on your Nook.
Insert a SD card into your computer's SD card slot or a SD memory card holder. Your computer's operating system will detect the card or memory card holder. Click "Start" and "My Computer," If using Windows. Double-click the SD or memory card holder's disk icon to open the device's Explorer window. If using a Mac, the SD card or memory card holder's icon will appear on your Mac's Desktop. Click the icon to open the device's window. Navigate to the location of the converted EPUB file. Click and drag the file to the SD card or memory card holder's open window.
SD Card Removal Process
To remove the SD card or SD memory card holder device, click the up arrow to the left of your Windows' system clock then click the icon that is a picture of a Universal Serial Bus cable. Double-click the SD card's entry to disconnect the device. Remove the SD card or memory card holder when the message "Safe to Remove Hardware" appears. If using a Mac, click and drag the SD card or memory card holder's icon to the Trash can. Remove the SD card or memory card holder When the device's icon is no longer on the Desktop. Insert the SD card into your Nook's SD slot and follow the on-screen prompts to transfer the converted file into the e-book reading device.