Windows 10 Version 1909 ( build 18363.387) ISO image leaks
Microsoft is expected to announce the release of Windows 10 Version 1909 at the same time as the Surface Hardware Launch Conference will be held tomorrow. However, as you know, this version is only a minor update, so it doesn’t make much sense when it is released or updated. Microsoft’s current focus is mainly to support the large-scale push of Windows 10 Version 1903 update to users before November 12. The focus of the development work is the Windows 10 20H1 version next spring.
If you still want to upgrade Windows 10 Version 1909, you can now upgrade the version by manually downloading the installation. The new version of the feature is mainly to optimize the performance of the system.
Download Windows 10 1909| 64-bit
Windows 10 1903 | 32-bit
Important: The link will download a zip file with Aria2 tool (page), Extract the zip file and run aria2_download_windows.cmd file, the tool will download UUP files from original Microsoft server, and later convert it to ISO image which you can use to make bootable USB device.
Update
On Thursday, October 10, Microsoft provides Windows 10 Version 1909 to the Release Preview ring.
Source, Image: quickfever