Am as thick as a canteen mug when it comes to this technology,what usb is the best when it comes to a fully loaded music usb for mk4 Octavia.i have been told usb have different connections.so any advice on here would be gratefully accepted.

Ideally, you should have a USB-C - this way you avoid the need for an adapter (from usb-c to usb-a), since Octavia mk4 comes with USB-C connectors.

I have something similar like this (same shape, different brand):
https://www.mymemory.ie/mymemory-128gb-dual-usb-c-usb-3-1-flash-drive-200mb-s.html

It small so it's harder to brake it accidentally. But it needs some persuasion to properly sit in the USB port because of the surrounding rubber in the center console.