how do i put music on my sd card and do i need a card reader as i have a slot in my hard drive for the sd card?

While many MP3 players--such as the iPod--come with massive hard drives, some smaller MP3 players often come with flash-based hard drives that won't hold a ton of songs. These players also typically come with SD card slots. If yours does, you may be wondering how you can put some music on your SD card so that you'll have more songs on your MP3 player. There are two different methods. Purchase an SD card that fits your MP3 player. Most MP3 players will tell you how big of an SD card the player can handle--such as saying that the MP3 player's SD memory is expandable up to 2, 4 or 8 GB. Determine if your computer has a multicard reader slot. Most modern desktop computers and laptops have a slot either on the front of the computer or the side of the laptop, and you can stick the SD card into the slot so that you can see the contents of the SD card on your computer. Put the SD card in your computer's SD card reader slot. Wait a few seconds and then click on "My Computer." Double-click on the removable disk drive icon that has SD next to it (usually drive E, I or G). You may need to click on a few different letters to accurately identify where your SD card is.

Purchase an external USB multimedia card reader and plug it into your computer's USB drive.