Once your SD card is properly recognized by your Android device, all tabs in the Send menu will be displayed by file type.
To send files that are only on your SD card,
1. Go to the File tab of the Send menu.
2. Tap [Internal storage▼] in the upper left corner, then select your SD card.
3. You'll see only the files and folders stored on your SD card. Select the files and folders you want, then tap Send.