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Does anyone have the specs on the ADATA XM11 solid state drive that's in some of the new Zenbooks?

It's meant to be a 128GB disk, but mine's only reading as 120GB. (114472MB to be precise.)

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Formatting the drive will result in some capacity being used by overhead functions. This often means formatted capacity is less than the "advertised" capacity. Also, many makes round out the size to a common size like 1 TB and convert based on 1000 megabytes is 1 gigabyte when in reality the conversion is 1024 megabytes to 1 gigabyte so for example, a 750GB hdd is really only about 732 GB.

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You're thinking of a Gibibyte, 2^30 bytes*. However 114472 x 1024 x 1024 = 120 032 591 872 which is either 120GB or 111.8 Gi. Either way not 128. *I wish the IEC conventions were in more common use, it's been more than a decade and I'm still having conversations like this – Spike Jan 17 at 2:59
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Modern SSDs always have over-provisioning which is where the other 8GB has gone.

Just as HDD manufacturers list their capacities in gigabytes instead of gibibytes, to maximize the numbers, some SSD manufacturers list the entire amount of NAND including what has been used for over-provisioning to make the capacity look larger.

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