| Component | Approximate Size | | --- | --- | | Base Windows 11 installation files (Windows Setup, core OS, drivers) | 4.5 GB to 6.5 GB | | Compressed .wim or .esd install image | 3.5 GB – 5.0 GB | | Full official ISO from Microsoft | 5.4 GB to 6.8 GB | | Installed Windows 11 on disk | 25 GB to 35 GB (before updates and user data) |