# Recovery 3001 0.4.0 Beta 1 Dev 10 R2

Dev 10 R2 is a safety-focused revision of the USB-first guided recovery flow.
It is an unsigned Windows development build, not a commercial GA release.

## What changed

- Guided discovery now shows only confirmed non-system USB storage formatted
  as FAT32 or exFAT.
- System disks, fixed disks, unsupported file systems, and inspection failures
  are omitted without exposing their drive letters or raw Windows errors.
- Exactly one eligible USB is selected automatically; multiple eligible USB
  devices require the user to choose the source.
- Safe-workspace destinations are mapped to a physical device before any work
  file is created.
- Same-device destinations are blocked for both normal and extended Windows
  drive-letter paths.
- UNC shares, volume-GUID paths, drive-relative paths, device namespaces, and
  any destination that cannot be mapped safely are blocked with plain-language
  cause, impact, and next action.

## Preserved Dev 10 gates

- Deleted-file scanning begins within two user selections.
- Work and recovered files cannot be written to the source USB.
- Default storage-engine term exposure remains zero.
- Capacity, disconnect, cancellation, resume, read-error, completion-count,
  verification, and result-folder guidance remain visible and honest.
- FAT32 and exFAT real-data regression must remain 1,000/1,000 exact size and
  SHA-256 matches before this revision is published.
- Distribution remains one installer EXE with install, Start menu launch, and
  uninstall verification.

## Remaining external gates

- Actual Windows 10 x64 execution.
- Four of five real non-expert users complete the workflow without help.
- Additional physical USB vendors and capacities.
- Long physical disconnect and read-error endurance testing.
- Windows code-signing certificate, signed binaries, and SmartScreen trust.

Android remains deferred and is not included.