Wrong

Apple Watch Series 12 · Hardware

Code in the watchOS 27 betas points to 128GB of storage

MacRumors reports that pdfu found a NAND storage profile in the watchOS 27 betas, tied to the T8320 chip and pointing at 128GB for the Series 12 and Ultra 4, against 64GB on the models before them. A profile in beta code is not a commitment to ship it, and the same write-up says the reference could belong to either watch.

1 min read

Apple Watch Series 12 Guide

Apple Watch Series 12

12 generations

How we know this

What changed, newest first.

OutcomeWrongThe outcome went the other way.

Sep 21, 2026MacRumorsA Chinese researcher finds a 128GB flash die inside 64GB Series 12 and Ultra 4 watches

Sep 8, 20269to5Mac128GB of storage, tied to the new S-class chip in the latest Watch models

Sep 7, 2026AppleInsiderDouble the Series 11's 64GB, and the code may point at the Ultra 4 rather than the Series 12

Sep 7, 2026pdfu via MacRumorsA NAND storage profile in the watchOS 27 code points at 128GB, up from 64GB on the watches before it.

Reported

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