How much more disk space does the Anniversary Update use up?

From what I read you need at least 6-8 GB of space to accommodate a minimal Win10 install. Here's an interesting Windows Report story on this very subject: How to install the Anniversary Update on 32GB devices
64 GB SD cards are cheap now. Could you give yourself some more breathing room that way instead?
HTH,
---Ed--

Thanks for your clarification and explanation. According to various sources, the on-disk footprint for Windows 10 versions is about 9 GB for x86 (32-bit) and 10 GB for 64-bit. To the best of my recollection there is about a 1 - 1.5 GB increase over the original 1507 release from July 29, 2015. I don't know where the 1511 release fits on that spectrum, but surely it falls within the range of 7.5-9 GB for x86 and 8.5 - 10 GB for x64. That said, actual on-disk size for Windows also depends on whether or not it's an upgrade or a clean install. These numbers apply only to clean installs. If you're upgrading, you will need to add a minimum 6 GB or so to account for larger WinSxS and Installer folders.
HTH,
--Ed--

PS: I wasn't advocating that you change your EMMc knowing full-well such devices are soldered and not replaceable. I was talking about your Secure Digital memory card (as I see I said) and asking you to contemplate replacing your current 32 GB SD card with a 64 GB SD card. Sorry if that was insufficiently clear.

PPS: here's one source that addresses disk footprint and DVD footprint for Win10: http://www.softwareok.com/?seite=faq-Windows-10&faq=31.

pjc123 said:

That is after cleaning up everything possible,

With no pagefile, no hiberantion file, no apps store installed and everything cleaned, I get this:

Run WC.bat as admin in order to clean more.

I think we're trying, Pjc123, knowing your situation requires minimum footprint. Looking through my backups for several machines, I see an increase of about 900 MB on my x64 machines for the on-disk footprint, across the board, going from 1511 to 1607. I don't run any 32-bit/x86 machines so I have no data to offer for that side of the distribution. My Dell Venue Pro 11 tablet has always had the smallest footprint (it runs the Insider Preview Version 1607 Build 14965 right now) and its current Windows footprint is 17.3 GB.
HTH,
--Ed--

You can use Wise Disk Cleaner along with CCleaner and one more thing:
Compact OS - Compress or Uncompress Windows 10 - Windows 10 Forums

So, just reporting back. I did the Anniversary Update yesterday and gained 1 GB of space after cleaning everything up (Actually closer to 2 GB because I added some more programs and files), so it worked out well. Thanks for the posts in this thread to insure that the update would not wipe out all my space. I used an external hard drive to perform the update because it would not run with only 3 GB of space on my eMMC drive. The update allowed me to pick the external drive (An older version of the Anniversary Update did not give this option) and everything went OK until later on during the update when it stated once again it needed more space for the update. I selected the external drive, but this time it did not accept it, and also would not accept the SD card (I don't remember how much space it needed the first time, but this time it needed 14 GB of space to continue with the update}. So out of ideas I figured I would reboot and see what happens. That fixed the problem and the update used the external drive and continued without any more problems. It took like a half a day on my slow machine to complete the update process. Everything worked fine afterwards except for LibreOffice, which I discovered a bizarre fix after playing around with it for two days (Can't say for sure it was related to the update or not).

Yah. Now that I am done I can finally I can go back to Linux on my Desktop computer and Raspberry Pi !!!