Problem moving iTunes library
Hello
I'm still using macOS Mojave and I want to move my iTunes library to a usb drive that will stay attached to my laptop. I copied the whole "Music" folder to this drive and then opened iTunes while holding down the "option" key. It asked me to choose a library. I chose the iTunes folder on the usb drive, but I get a message saying "An iTunes library file could not be found in the folder 'iTunes'. Please choose a different folder.
What should I do?
Thanks.
MacBook Pro 13", macOS 10.12