If you have a large collection of music in files, this device is drag and drop heaven. Format the card in your new walk and then copy over your collection via a card reader (to speed up process) then top up your collection via the device over USB I love being able to search and select my music via folders (I'm old-school) Perfect for my needs, LDAC bluetooth audio with Sony headphones is unbeatable sound qualty Buy both and enjoy your music !