Hey, and welcome to DS
Id say its well on its way to realistic, but not quite there yet.
I do have a few tips for you to get closer to photo realism.
First off, if you ever want it to look like its from the real world, use an HDR image to cast ligth.
HDR images also work as an environment that your models can reflect.
Add a small bump to the model, it will help the reflections in your anisotropic material.
But remember to keep the bump small and very light, too much and it wont look good, too little and it wont show at all.
I would also suggest adding a small space between the USB connector and the shell of the stick, sticks of the type that you modeled, the ones that you push out always have this tiny space there. And also the golden material needs some more work, in my opinion.
Oh, and the link you posted is to your local HDD, you should upload the image before linking it, we wont be able to see it otherwise
You are well on your way to realism, do not stop playing with the settings!
The best way to learn is to get your hands dirty and play with every little setting to see what it does
Please do not take what i wrote as anything bad, i only mean to give you some constructive critique.
Hope to see more artwork from you!