Thank you all for your thoughts.

I was tempted to replace the card that came with the device as its an unbranded made in China card that I don't think will be too reliable over time unlike a Sandisk, Samsung etc and when looking at new cards class 10 or UHS-I cards don't seem much more expensive than a class 4 or 6 card.

I have backed up the card to my PC so I guess I could just use the supplied card and if it fails or I start having issues I could replace it then.