Q: How do I enable an iPod Touch 5 for disk use?

Bit of background as to why I wish to do this: I've made a voice memo and I want to get the WAV file from my iPod Touch 5 to my drive. As this apparently necessitates the use of iTunes (Ver. 12.0.1.26) I knew I was in for an interesting time and so it has proved....

The following steps to try and bring this about are all referenced from here -> Using your iPod as a storage drive - Apple Support.

The fun begins at step 5 when it transpires that to get the voice memo file off an iPod Touch 5 I have to get my Mac Mini to recognise the iPod as a drive.

As opposed to selecting "Enable disk use", which apparently is not an option for my iPod Touch 5, I selected "Manually manage music and videos."   Then, according to step 6, "The iPod disk icon appears on the desktop and in Finder windows....". Lo and behold I selected "Manually manage music and videos." .....

....and yet my iPod is still not visible as a device.

Any advice re how I get my Mac Mini to recognise the iPod as a drive or how to get the files off my iPod by alternate means would be appreciated.  Just one caveat - I would prefer a solution that doesn't require syncing iTunes up to my Mac Mini at any point.

Cheers.