Windows updates require a lot of disk space, which is a problem for devices with little internal storage. Microsoft solves this problem by "reserving" some disk space for updates in the next version of Windows 10, code name. 19H1.
Microsoft pushed cheap laptops with small hard drives for years now. However, anyone who has ever used one has quickly encountered a major problem: it usually does not have enough memory to install major updates. This leaves them with no major patches, security patches, and new features. Although you should not update to the latest version of Windows first dayyou may want to get there This is therefore a serious problem.
Currently, the solution is to delete as many files and programs as possible or to download the update to an external storage. None of these answers is always easy, especially for a student with a cheap device, no USB key, and needing to keep all his files and programs.
Microsoft is trying to solve this problem with a controversial method. Starting from the next major release (and available to insiders now), Microsoft will reserve at least 7 gigabytes of space on your hard drive.
The space will not be completely lost. Windows will store temporary files here if space is not used for updates. Files created by applications and processes that would have taken up space anyway will now go into this reserved storage. At the time of the update, Windows will automatically delete all files from the reserved storage and use the space for downloading the update files.
Microsoft says it does not use a virtual drive to do this. As Craig Barkhouse of Microsoft explained in the TechNet Comments:
Instead, we designed an elegant solution that would require adding new support to NTFS. The idea is that NTFS provides a mechanism for the maintenance stack to specify the amount of space reserved, for example 7 GB. Next, NTFS reserves 7 GB for maintenance purposes only. What is the effect of this? The free space visible on C: decreases by 7 GB, which reduces the space available for normal applications. The service can however use these 7 GB.
The amount of placeholder depends on the optional features and languages that you have installed. The more features and languages on the system, the more space will be reserved to properly update these features. If you later uninstall a feature or language, the placeholder will be reduced.
Microsoft says the reserved storage should start at around 7 gigabytes and move up from there.
In theory, this space may have been used anyway and users lose nothing. However, some users have less than 7 gigabytes of temporary files at a time. These users will see less available space overall. It's a compromise that will help some people while reducing available storage for others.
Windows 10 19H1 will probably be released in April 2019.