Change where iTunes files are stored on PC
Locate your iTunes files
In the iTunes app on your PC, choose an option (Music or Movies, for example) from the pop-up menu at the top left, then click Library.
Do one of the following:
Find out where a file is stored: Select the item, then choose Edit > [Item] Info.
The path to the file is shown at the bottom of the File pane (next to Location).
Show the file in File Explorer: Select the item, then choose File > Show in Windows Explorer.
Change where imported files are stored
You can change where your iTunes media files are stored.
Important: For best results, don’t change the location of the iTunes folder or the folders inside it.
In the iTunes app on your PC, choose Edit > Preferences, then click Advanced.
Click Change, then select a new location for your files.
From now on, new songs and other items you import will be stored in the new location. Songs you’ve already imported stay in their current location.
Tip: If you now want to move your current files to the new location. see Consolidate your files in the iTunes folder.
To go back to storing imported files in the iTunes folder, choose Edit > Preferences, click Advanced, then click Reset.
If a song no longer appears in iTunes
If a song used to appear in iTunes but doesn’t now, it may be because the iTunes Library file was moved, or the song was moved from the iTunes folder. To make your songs appear in the iTunes window again, try the following in this order:
Locate your iTunes folder (by default in your PC’s Music folder), then drag it to the iTunes window. You see the songs in your library again. If the iTunes Library file was included, you also see your original playlists.
If that doesn’t work, your songs may be elsewhere on your hard disk. Go to Start > Search, then search for a song by title or artist. Drag songs (or folders containing songs) to the iTunes window to add the songs to iTunes again.
If you don’t find songs by searching, check the Recycle Bin.
Or, if your library is on an external drive, ensure the drive is connected to your computer before opening iTunes. (Or, if it’s on a network, connect to the network first.)
If files have mysteriously disappeared, run a full scan of your computer with up-to-date antivirus software.
If you delete the iTunes Library file, your songs will no longer appear in your library even though the song files are still in the iTunes folder.