How to download ps3 maps

So i've been downloading maps on the internet and putting them into my usb. I then put the usb in the ps3 copy the map and when i load minecraft it doesn't seem to be there. Have i done anything wrong? As it is my first time. I checked on youtube how to do it and i have followed the steps too.

How to Upload Minecraft PS3 Maps:
Obtain a USB drive or any other device that will work on both your PS3 and your PC
Go to the PS3 XMB(Main Menu)
Go to "Game"
Go to "Saved Data Utility (PS3)"
Locate the map you want to download
Press Triangle, and then click copy
Choose the USB drive, this will copy the map data to the USB
Unplug your USB drive from your PS3 and plug in to computer
Open the file manager for the USB drive to see the map file
You can now share this file online

How to Download & Install Minecraft PS3:
Download the map
If the map is in a.zip file, extract it
Place the folder onto a USB drive
Plug your USB drive into your PS3
Go to "Game"
Go to "Saved Data Utility (PS3)"
Click USB device
Locate the map, and click copy
The map will now be on your PS3 and ready to play!

You're copying ot to the minecraft saved data utility right?