Media creation
Foundry OSD creates the boot media used to start the target device.
Standard media settings
Set the standard media options before starting the build:
- ISO output path
- USB target disk
- Target architecture
- WinPE language
- WinPE driver vendors


ISO and USB comparison
| Aspect | ISO | USB |
|---|---|---|
| Output | Single .iso file | Bootable physical USB device |
| Destructive behavior | Non-destructive | Erases and repartitions the selected USB disk |
| Best fit | VM testing, remote mounting, archival, controlled distribution | Field media, repeated deployments, persistent cache-backed workflows |
| Runtime storage | ISO-backed runtime path | Persistent Foundry Cache partition |
| Cache directories | No dedicated USB cache partition | Initializes Runtime, Cache\OperatingSystems, Cache\DriverPacks, Cache\Firmware, State, and Temp |
| Operational tradeoff | Easy to store and distribute, but not a prepared physical device | Ready to boot directly, but tied to the selected USB disk |
Choose ISO when you need a reusable artifact. Choose USB when you need a physical deployment device prepared directly by Foundry OSD.
Shared preparation
Before either output is created, Foundry OSD prepares the same WinPE workspace:
- Resolve ADK tooling.
- Build the WinPE workspace.
- Inject selected drivers.
- Apply WinPE language components.
- Provision Foundry Connect.
- Stage configuration, network assets, and Autopilot profiles when configured.
- Prepare the bootstrap path that resolves Foundry Deploy later in WinPE.
Create ISO
ISO creation packages the prepared WinPE workspace into a reusable file.
- Select the ISO output path.
- Confirm the target architecture and WinPE language.
- Select the driver vendors to include.
- Start ISO creation.
- Wait for the final
.isofile to be written.

Create USB
USB creation provisions the selected disk directly.
- Select the USB target disk.
- Confirm that the selected disk is the intended removable device.
- Select the target architecture and WinPE language.
- Select the driver vendors to include.
- Start USB creation.
- Confirm the destructive action when prompted.
USB creation erases and repartitions the selected disk. Do not continue until the target disk is confirmed.

Build progress
During media creation, Foundry OSD reports progress for runtime downloads and media build steps. Foundry Connect is provisioned with the boot image. Foundry Deploy is resolved later by the WinPE bootstrap, with USB cache paths used when available.



Advanced media options
Advanced media options affect boot behavior and staging:
- CA2023 signature mode
- USB partition style
- USB format mode
- Custom driver directory
Change these only when a deployment environment requires them.
Capture the advanced media options section with CA2023, partition style, format mode, and custom driver controls visible.
Next steps
- Open Network Readiness to understand what happens after the target boots.
- Open Expert Mode when media should include predefined deployment behavior.