
The Unofficial Apple Weblog has a nice post on whether you are supposed to have a space between the value and the unit when talking about digital storage. For example, do you write 250GB or 250 GB (or 1.44MB vs 1.44 MB if you’re old school). It turns out that the correct answer is to keep the space.
From the article:
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)
So this applies to most other units of measurement as well. I know that I never really paid much attention to this in the past and probably switched back and forth or used the incorrect convention.
32 GB versus 32GB: Almost everyone is writing it wrong