When the amount of memory on your computer sucks, you either have two options: Buy more RAM, or make use of the storage space you've got by compressing your files. One program that will become your new BFF should you choose to do the latter is WinRAR. WinRAR is a compression and packaging software that makes it way easier to store large files on your computer.
If you'd like to compress and then unpack audio media files, check out this tutorial to learn how to install WinRAR and then download songs into your iTunes or other mp3 player.
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