How do you transfer MCPE worlds to PC?

I have a world that I would like to put on my PC for backup reasons. My tablet is a Kindle Fire and my PC runs Windows 10. How might I go about accomplishing this task?

If you're referring to making a backup on your PC. You can simply upload the world from the "games" folder. I recommend ES File Explorer for this one as it shows the icon of the apps. Also, the "games" folder is located OUTSIDE the Android folder. The world name would be random. Just try to find the world that you want to upload by opening the world folder and looking at it's "world_icon.jpeg" file. Upload that world to Google Drive and download it from your computer. Simple as that!