Past versions of Windows have required a nominal amount of disk space to run properly. The required storage amounts for the different editions of Windows was a tight fit, but with only a few programs it was doable. The new minimum space requirements beginning with the 1903 update (tentatively end of May 2019) will be upped from 20GB to 32GB for both 32-bit and 64-bit versions of the operating system.
How Much Space Is Windows Using?
There are lots of ways to check this out but I like a little utility that’s both free and portable (my favorite combination of words). It’s called Space Sniffer. Here is an example of its output when focused on the Windows directory:
Note: I had some real problems getting this image down to a manageable size so I apologize for it being hard to read.
To help you out a bit here, Windows is using 22.8GB of drive space on this computer. The new update will add 7GB to this which will be used exclusively for update purposes and will demand at least 32GB of storage for the update. It is not clear to me whether Windows will create a reserved 7GB partition.
If your system does not have the needed extra space and cannot be upgraded, then it will be permanently stuck with the 1809 update until it expires in May 2020.
This is probably not a big deal for most people since today’s drives are generally quite large. Even big SSD’s prices have dropped to the point where they have become very affordable. You can get a good 512GB SSD for in the neighborhood of $100 these days. This mostly applies to owners of older laptops, for example, which came with much smaller drives where that space is at a premium.
Consider yourself warned…