When is 128GB not 128GB? Well, that's a trick question to be fair, but the answer I'm looking for is when it's inside a Microsoft Surface Pro.
Microsoft has revealed that the full-blown Windows 8 install grabs as much as 45GB of space for itself and pre-installed apps, leaving only 83GB of user-available space. And that's if you go with the bigger of the two models. The 64GB version may leave you with as little as 19GB of space to play with.
Yes, all retail smartphones, tablets and PCs give up some of their available space to the OS in question and various pre-installed bits and pieces, but losing anything from a third to two-thirds of the advertised storage is a big deal.
It adds fuel to the debate that devices should be advertised based on their real user-accessible storage space, not a theoretical total that itself is based on flawed mathematics in the first place, which is why the opening line is a trick question.
A quoted 128GB actually isn't even 128GB in reality, as advertised storage sizes are calculated in part using a decimal system rather than fully on binary-based calculations.
So 128GB is more like around 119GB in reality. We're assuming that the 45GB is based on the same system of calculation, however (Microsoft doesn't specify), so the proportions remain the same even if the actual figures aren't. If it's a "real" 45GB, of course, it makes for an even bigger percentage of your total gone.
Never mind – Surface Pro users can at least make use of an extra 7GB of SkyDrive space Microsoft includes as standard. We'll leave you to “do the math” on how much difference that actually makes.
Even if the true figures do work out slightly differently to how it's come across, it remains a bitter pill to swallow for anyone who does decide to fork out what's likely to be close to £1,000 for the Surface Pro (we still don't have UK prices or launch dates yet).
What do you think – should we all just accept that storage is never going to be as advertised, or is it time for the quoted figures to start reflecting reality more accurately? Hell, is there any real chance of that change happening in the real world? Let us know in the Comments below.