Windows 7 Libraries are convenient ways to access the contents of folders (directories) that may be scattered across multiple hard drives or may be buried deeply within hierarchies of Windows 7 folders.
Using libraries to look at pictures, or to open a file for editing, works great. If you opened a file from a sub-directory (sub-folder) within the library, then a Save will save to the same location. You can use Save As to save to a different location. The complication happens when you want to save to the library’s main folder.
If you have a one-to-one relationship between libraries and folders, that is, if you create a library and link one folder in it, the library little more than a convenient way to access a folder on your hard drive. If you save a file to the library, Windows 7 would actually save the file in the linked folder.
If you link multiple directories to a single library, and then save a file to the library, where does Windows 7 save the file? Remember, libraries are not really directories on the hard drive — they’re little more than a display method for directory contents.
The answer is that libraries have a default directory in which they will save the file. You can change the default directory, too. (of course, you can always select a sub-directory and save there — and hope you know where that sub-directory is really located on the hard drive…)
Let’s take a look at the Music library.
First, let’s look at the left panel of this Windows Explorer image. Notice that the Music Library has two sub-folders, My Music (which has a sub-folder iTunes) and Public Music (which has a sub-folder Sample Music).
Now, look at the right panel. In this display of the Music Library, the contents of the two included folders are displayed — two sub-directories iTunes and Sample Music and a file "Andrew Lloyd Webber – The Phant…” which is located in the My Music directory. The included folders themselves are not displayed.
To change the default directory for saving to a Library, just right-click on the Library’s name (Music, in this case) and select Properties. You’ll get a dialog box like this:
Notice that My Music (D:\Users\tas) has a checkmark beside the name — that’s the default directory for saving files. If I wanted to save to the Public Music (C:\Users\Public) directory by default, I would click the Public Music line.
At that point, the button "Set save location" would be available. I’d click the Set save location button and then OK or Apply.