Microsoft has made this official through a blog post, saying that with current builds, Windows can efficiently compress system files. It seems that Windows 10 will be able to ‘give back’ approximately 1.5GB of storage for 32-bit devices and 2.6GB of storage for 64-bit Windows. Phones running Windows 10 will also make use of the same efficient compression algorithm. Windows uses smart compression techniques so that when you are upgrading to Windows 10, the computer assesses its own performance and determines what compression factor to use. While the amount of storage you will be able to save doesn’t seem that much when thinking of a full-fledged desktop PC, it will definitely have a great impact on tablets. Besides this, Windows 10’s refresh and reset options will no longer use a separate recovery image, which is usually preinstalled by PC makers. Thus, this should eventually free up somewhere from 4GB up to 12GB, with as much as 15GB of storage savings on certain devices. You won’t be able to use this on phones, as they have a different recovery solution.
