32 GB versus 32GB: Almost everyone is writing it wrong
The International System of Units, otherwise known as the metric system, sets the standards for not only what a given quantity is, but how to express it. On page 133 of the SI brochure, the International Bureau of Weights and Measures says, “The numerical value always precedes the unit, and a space is always used to separate the unit from the number […] The only exceptions to this rule are for the unit symbols for degree, minute, and second for plane angle.” (emphasis added)
Pedantry aside, I do this wrong all the time.