We will load a USB Flash drive with 25 piano/organ accompaniment MP3 files. Simply insert the flash drive into a USB port on a personal computer and you can copy and play the files in your services as needed. Please note: Multiple flash drive orders (such as ordering volumes 1 and 2) will be loaded on one single flash drive. If you happen to require separate flash drives for separate flash items, please indicate that in your order comment during checkout. When you add the thumb drive to your cart, select whether you want High (normal range) or Low keys.