How would the components of a microsd card or USB stick have a unique odor compared to the myriad chips in all of our electronics? Such as TVs, stereo's, comput

How would the components of a microsd card or USB stick have a unique odor compared to the myriad chips in all of our electronics? Such as TVs, stereo's, computers, etc.? Wasn't there an article that said drug dogs were about as accurate as a coin flip?