iTunes: About the Add to Library
iTunes creates an index of all music, audio book, and video files that are added to iTunes so you can access them quickly. This index is called the iTunes Library. When you add something to the library, essentially you are taking existing audio or movie files and adding an entry for each to your iTunes Library index. The files can be in your Home folder, somewhere else on your hard drive, on an external hard disk, or even on another computer that you are accessing through file sharing.
Add to Library
If you want to add files to your iTunes library, you can drag files from the Finder to the appropriate icon on the left side of the iTunes window, or choose File > Add to Library (on Windows, choose Add File to Library or Add Folder to Library) and then select the song file or folder you want to add. iTunes adds entries in your iTunes library for the selected files, and copies the files to your iTunes Music folder (if you have that option selected in the Advanced pane of iTunes preferences).
Note: When you add unprotected WMA files to your iTunes library (Windows only), iTunes converts them to new files that iTunes can play, based on your import settings.
Download Instructions for Zips
Once you click on the “Download” button on the final page, a box will pop up with two options: Open or Save. Please click on the “Save” button, and save the file to your computer first before you open it.
Many of the files for sale will be in .ZIP format. A ZIP file uses the .zip file extension and is used to compress files into one folder.
For Windows users, if you have purchased a ZIP file, the first step is to save the zip file to your computer and then navigate to your folder. To unzip the file, you will have to right-click on the folder and select “extract.”
For Mac users, if you have purchased a ZIP file, the first step is to save the zip file to your computer and then navigate to your folder. To unzip the file, you will have to double-click the file you wish to unzip. Your files will be unzipped into the same folder as the original ZIP file.