I have two budget laptops (a Lenovo S21e-20 and a HP Stream 11 Pro) that both have non-expandable, non-replaceable 32GB (30GB usable in real life) eMMC storage. Windows 10 won't upgrade to the Anniversary Edition on these laptops as there isn't 20GB available space on them (64bit systems). This means there is no upgrade in Windows Update when I trigger a manual check, and the upgrade app you can download from https://support.microsoft.com/en-us/help/12387/windows-10-update-history says there isn't enough free space.
That's right, I uninstalled all non-vital apps, disabled the hibernation file, disabled the swap file, disabled system restore and deleted all the restore points, cleaned up all files (including system files, temp files etc.), cleaned browser cache, used CCleaner, etc. I can't get more than 15GB free space. It's mission impossible to have 20GB free space on a 30GB drive with Windows 10 installed on...
Why there isn't an option to use a memory card or a USB flash drive for the installation? Back last year, the November update let me use a memory card or USB flash drive for the installation. MICROSOFT DEVELOPERS, please add this memory card/flash drive installation option to the Anniversary edition too. I don't really want to do a clean install, and also, it cannot be expected from the average user.
Look at how many 32GB eMMC laptops are being sold right now: http://www.pcworld.co.uk/gbuk/computing/laptops/laptops/703_7006_70006_xx_ba00010671-bv00308565|bv00308566|bv00308567/2_20/price-asc/xx-criteria.html I guess there are hundreds of thousands (if not millions) of these budget laptops already sold, and they keep selling. I guess none of these can be upgraded to the Anniversary Edition at the moment... MICROSOFT, please confirm that you know about the problem and that there will be a solution soon.