Why wont my iMac recognise my iPod?

I have an old iPod 5th Generation with 30GB that my dad gave me.

Luckily I have the charging cable for it so I am able to connect it to my Imac 2017 computer and add in my preferred music however once I plugged it in, it just charged and did no show the display saying "do not take the plug out" or something.

So I looked into the setting and 'about' Which shows the device information and it said 'Format: Windows' as well as the 'version: 1.3' Could that be the reason why my imac is not recognising the device?

I've also restarted the ipod to see if anything happens but clearly not.