An ESD (Electronic Software Download) file is a compressed Windows image. One ESD file holds a single Windows version (e.g., Windows 10 Pro) or multiple editions within the same OS generation (Home/Pro/Education). It cannot legally or technically contain three distinct OS generations due to different setup engines, boot.wim structures, and driver caches.
You maintain 50 computers: 10 running Windows 7 (legacy CNC machine), 30 on Windows 10, and 10 new Windows 11 laptops. Instead of carrying 3 separate USB drives, you find a multi-version ESD that packs all three architectures into a compact file. You use a tool like Rufus or Ventoy to deploy the specific version needed.
Email body: Hello,
Instead of carrying three different thumb drives, a single AIO ISO lets you: