External Superdrive/USB issues

I have a 2015 Macbook air with no cd/dvd reader.

I purchased an Apple Superdrive and am having issues. When I connect it into either of the USB sockets, there is a slight "whir" and then nothing and it will not accept the cd/dvd.

If I connect to the Macbook and restart or close down and start up, the superdrive bursts into life and I can copy files from cd/dvds to the Macbook. I can eject and put further cds/dvds in. If I disconnect the superdrive and plug it in again, I'm back to the point above.

When I connect my IPhone to either USB port, the device is recognised instantly and I can update my music with no problem. The superdrive appears to work normally, but only if it is attached at startup. Also, I have taken one superdrive back to the store and had it replaced because of these issues, so do not think it is the superdrive as such and although I am "techie", I am not that techie and could do with a hand.

Any thoughts before I go along to those nice people at the local(ish) Apple store and ask them?

Thanks

Hi there, start to have a look here: Get help with the slot-loading SuperDrive on your Mac computer - Apple Support

Probably before to do anything else, I would do this: Reset the System Management Controller (SMC) on your Mac - Apple Support

Hi Staffs,

Try the following to isolate the issue.