A modern rebuild of rphi/Multicopy — original concept and code by Robert Phipps, 2016. This fork is maintained by Justin Pulley and is unaffiliated with the original author.

Bug fixes:

• UI no longer freezes during copy (original called Task.WaitAll on the UI thread)
• Erase logic was broken — original used VolumeLabel as a filesystem path; now correctly clears the root directory

New features:

• Per-drive progress bars with live percentage and byte counts
• Copy speed (MB/s) and ETA per drive
• Overwrite existing files option
• Cancel in-progress copy (stops at the next file boundary)
• Validation before copy starts with clear error messages

• Windows 10 or 11 (64-bit)
• .NET 9 Desktop Runtime — the installer will prompt you if it's missing

Download Multicopy2-x.x.x-Setup.exe from Releases and run it.

Prerequisites: .NET 9 SDK, Inno Setup 6

# Run the app directly
& "C:\Program Files\dotnet\dotnet.exe" run --project Multicopy2\Multicopy2.csproj

# Build the installer
.\build-installer.ps1 -Version 1.0.0
# Output: installer\output\Multicopy2-1.0.0-Setup.exe

Or open Multicopy2.sln in Visual Studio 2022.

Until the installer is signed with a code-signing certificate, Windows may show a SmartScreen warning ("Windows protected your PC"). You can click More info → Run anyway to proceed. Signing requires purchasing an OV or EV certificate from a certificate authority such as DigiCert or Sectigo.

MIT — see LICENSE. Includes original work by Robert Phipps (MIT assumed, as no license was specified in the original repo).

The original .NET 4.6.1 WinForms project is preserved in Multicopy/ for reference.