It's not new, it's from RS5. Each time you pretty sure about new feature, check it with previous branch/channel.
I once had around 12GB of SYSTEM registry hives + account profile, after abusing running as TrustedInstaller for a couple of months Check your C:\Windows\System32\config\ Or stop being so melodramatic about a mere 1GB
So just what is the differences between 19008.1 vb 19008.1.191019-1715.VB_RELEASE_CLIENTPRO_OEMRET_X64FRE_EN-US.ISO 4,037,964 kb & 19008.1000 Next 19008.1000.191022-1044.VB_RELEASE_SVC_CLIENTPRO_OEMRET_X64FRE_EN-US.ISO 4,270,406 kb
UPDATE 10/24: We have released Build 19008.1000 which is a Cumulative Update with no major changes. We are trying out our servicing pipeline on 20H1 builds.
I made clientmulti but there seems to be no difference, except 19008.1000 has integrated ssu/cu. 19008.1 files: Code: 934a6d1740083c531d3c0bdeabffe251e70609d7 *core_en-us.esd 97104dc2f5d7d2328492a3d3049a514c8c15f72d *coren_en-us.esd 5300d2df770181fab4d3f43f1221e547c82a4226 *microsoft.modernapps.client.all.esd 9548121f35d1f89ed176185a9748e6e14d08a2ce *microsoft.modernapps.client.core.esd 0be9253569266a11679e6ec828a1b67bf12f1d4c *microsoft.modernapps.client.professional.esd eb2ed8f955bc64c982584c9b0cd7a4ccd9e3f92b *microsoft.modernapps.clientn.all.esd 873184faa6c4b2525b254adade09a384efc0b6c9 *microsoft-onecore-applicationmodel-sync-desktop-fod-package-amd64.cab c7d0a6eac6bf2df15b6d691dad0afa770b623b78 *microsoft-onecore-directx-database-fod-package-amd64.cab c5681e638b4059463a384dddf8960b271b398dc0 *microsoft-windows-client-desktop-required-package.esd 0edaee14197b83f2ba9949422560dc2c08218796 *microsoft-windows-client-desktop-required-wow64-package.esd 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And you already verified that it is really occupying all that space? It could be a bug with the amount of GB shown there.
On Tuesday, the first build (19504) from the 20H2 (Manganese) branch on the SkipAhead channel will be available. @Enthousiast It's time to create a new topic.