: ISOs downloaded via the Microsoft Media Creation Tool often use .ESD (Electronic Software Download) compression, which is more compact than the standard .WIM (Windows Imaging) format used in direct browser downloads. How to Get a Smaller 3.5 GB ISO
If you need a compact Windows 10 installer, use these methods: Spiceworks Community Burn Windows 10 ISO to 4.7G DVD - Spiceworks Community windows 10 iso 3.5 gb
To obtain a Windows 10 ISO , you generally need to download the 32-bit (x86) architecture . Most modern 64-bit (x64) ISOs exceed Microsoft Learn Comparison of ISO Sizes (Version 22H2) Architecture Typical ISO Size 32-bit (x86) ~3.5 GB to 3.9 GB Older PCs with less than 4GB RAM. 64-bit (x64) Modern PCs with 4GB+ RAM (Standard). Both (Dual) Creating a universal installer for any PC. How to Download the 3.5 GB (32-bit) ISO The official way to get a specific architecture is via the Microsoft Windows 10 Download Page using these steps: : ISOs downloaded via the Microsoft Media Creation
The size of a Windows 10 ISO depends primarily on three factors: 64-bit (x64) Modern PCs with 4GB+ RAM (Standard)