Portable apps are applications and tools that can be started directly upon clicking them, with no prior installation needed.

In case, you have music files stored on an external device like USB flash drive or an external hard drive, you can add music from a USB flash drive or external hard drive directly to the library.

Apple's iTunes, it is worth noting, has over 4 billion music ... USB drive? It can't be plugged into a car stereo yet. But a consumer can rip the disk to their hard drive and load it onto an MP3 ...