First things first go to this link and download Horizon
http://www.xboxmb.com and click Horizon
Now first step
1. Go to YouTube and search Minecraft Xbox map downloads then click on the video you want to watch
2. Then look at the description and look for download link
3. Then press download and when its done it should say something at the bottom like save
4. Click the drop down arrow and save it as downloads
5. Next when its done go back to horizon and make sure your profiles there and there and click
Inject new file and find your downloaded map
6. After it loaded and said it was successfully saved plug your USB back in your xbox
7. Last go to storage and move the usb map to hard drive or whatever you use and your done
That's basically it if it didn't work feel free to pm me
