Consolidating itunes files
Here's the best way to do so: How to download all your music from i Cloud Music Library to your Mac If you have Apple's Time Machine backup system enabled — or any other cloud- or system-based backup — your i Tunes library should automatically be covered.
This way, if you ever need to restore, you can just pop back in Time Machine's History (or a past backup from Crash Plan or Carbon Copy Cloner, for example) to retrieve it.
The location of the folder will be listed in a box labeled “i Tunes Media folder location.”Once you’ve double checked the location of the i Tunes Media folder, connect an external hard drive to your Mac, click the i Tunes folder, and drag it onto the external hard drive.
When you do this, the library and media files located within the i Tunes Media folder will copy over to the external drive.
Apple has said that any music you’ve previously purchased and downloaded via i Tunes will continue to be available to you within the new Apple Music app — but if you’re worried about whether making the jump from one app to the other will go as seamlessly as the company says it will, then backing up your music library before you upgrade to Catalina might still be a good idea.
To do so, click the “File” menu at the top of the i Tunes screen, select “Library,” then click “Organize Library.” Check the box next to “Consolidate files” and click “OK.”Now you’re ready to actually back up your i Tunes Library.
The Music app was further segmented in 2012, when the release of i OS 6 coincided with the adoption of a standalone Podcast app.
The announcement that i Tunes will no longer exist in Catalina simply takes this same format — a trio of apps geared toward handling music, videos, and podcasts — and applies it to Apple’s laptops and desktops, thus standardizing how all these forms of media are handled across all of Apple’s devices.
This copied folder should be deleted immediately after it is no longer needed because it takes up extra space on your computer's hard drive unnecessarily and could cause confusion with your most current i Tunes folder.
According to Apple, the long-running media management program will be retired in the next version of the mac OS operating system and replaced by three new apps: Apple Music, Apple TV, and Apple Podcasts.
There are a few ways to back up your i Tunes library; it's important to choose one and regularly back up so that you won't have to worry about your local copy getting lost or damaged.