Currently Being ModeratedAug 25, 2012 3:08 PM (in response to MJMP1)
I was going to type a quick answer but now I think there is more of a situation here than at first appears.
Do not copy just your media to an external hard drive with Finder. iTunes will lose track of it. If you have done this and it is not too late, put it back where you got it from. Then move your whole library (which is a collection of files and folders that need to be kept together) as in:
iTunes: How to move [or copy] your music to a new computer [or another drive] - http://support.apple.com/kb/HT4527
Quick answer if you use iTunes' default preferences settings: Copy the entire iTunes folder (and in doing so all its subfolders and files) intact to the other drive. Open iTunes and immediately hold down the Option (alt) key (shift on Windows), then guide it to the new location of the library.
Do not confuse moving your whole folder and library with moving just media files as in
iTunes for Mac: Moving your iTunes Media folder - http://support.apple.com/kb/HT1449
Currently Being ModeratedAug 25, 2012 3:19 PM (in response to Limnos)
So if I moved just the iTunes Media folder (http://support.apple.com/kb/HT1449), is there anything I can do at this point?
Or do I have to go back and copy the entire iTunes folder (not just the iTunes Media folder) onto the external drive and open it via the Option key method?
Currently Being ModeratedAug 25, 2012 3:27 PM (in response to MJMP1)
Did you move your media using the process as described in the link you show, or did you just drag it there in Finder?
If you used the correct process then all future media should go to that location.
If you did it in Finder, copy the rest of your iTunes library folder to the external and put that folder back inside of it in the location it belongs (see below). Then start iTunes with the option key method described earlier.
iTunes 9 [and later]: Understanding iTunes Media Organization - http://support.apple.com/kb/ht3847
Image of iTunes folder structure Dec. 2011 - https://discussions.apple.com/message/16923545
Image of folder structure and explanation of different iTunes versions (turingtest2 post) - https://discussions.apple.com/message/13025536 and https://discussions.apple.com/message/17457605
Well worth reading if you are going to start experimenting with iTunes:
What are all those iTunes files? - http://www.macworld.com/article/139974/2009/04/itunes_files.html
Currently Being ModeratedAug 25, 2012 3:35 PM (in response to Limnos)
I guess I should provide some additional details.
I wanted to change my internal hard drive on my laptop. So I moved the iTunes Media Folder per the instructions found here: http://support.apple.com/kb/HT1449. I did not just "copy and paste" the folder onto the external drive.
I installed my new hard drive and install OS X Mountain Lion. Now I want to have iTunes point to my media library on the external drive.
Currently Being ModeratedAug 25, 2012 3:53 PM (in response to MJMP1)
Using the process in that link all you did was move your media to the external drive. The rest of your library (including the all imortant and everything-controlling library.itl file) was left behind on your internal drive. If you no longer have that then all you have now is a bunch of media files, but not a "library" as such. You will have to add the media fiiles back to a blank library to start afresh. If this is the situation then post back before you do it and we can provide suggestions on how to do this so it ends up on the external drive (all of it this time).
If you happen to have a backup of your old internal drive it may be possible to reconstruct the library using the backup.
Read the links I provided earlier on how iTunes is really a group of files and folders working together.
Currently Being ModeratedAug 25, 2012 4:16 PM (in response to Limnos)
I still have the original drive so let's do this and start from the beginning.
I have an internal hard drive that I want to replace with another internal hard drive. The only problem is...the new internal hard drive is smaller in capacity.
(1) I want move all of the iTunes content from the old internal hard drive onto an external hard drive.
(2) With all of the iTunes content (the entire iTunes folder?) on the external hard drive, I want the iTunes on the new internal hard drive to point to and use the external hard drive.
Please provide the steps and/or links to accomplish these steps. Thanks!