Question: how to move files from internal storage to sd card kindle fire?
Answer: Tap the name of the app you want to move and tap “Move to SD Card”. If it's already on the SD card, you'll see a “Move to Tablet” button instead. If you can't move it to the SD card, the button will just be grayed out. You'll have to re-download videos if you want to move them from the internal storage to the SD card.