Windows 11 update KB5063878 or KB50626606 Large file transfer fix

Effective Strategy for Large File Transfers on Windows 11: Using Robocopy as a Workaround for Updates KB5063878 and KB50626606

Windows 11 users may encounter challenges when transferring large files, particularly after recent updates such as KB5063878 and KB50626606. These updates, while crucial for security and performance enhancements, have inadvertently introduced issues that hinder efficient large file transfers. Fortunately, there is a reliable workaround: leveraging Robocopy, a native Windows command-line utility, to facilitate faster and more stable file transfers.

Understanding the Issue

Post-update scenarios sometimes result in sluggish or failed large file transfers, which can disrupt workflows and productivity. These issues are often addressed in subsequent updates; however, until then, employing alternative methods can be beneficial.

Introducing Robocopy: Windows’ Built-in File Transfer Tool

Robocopy (Robust File Copy) is a command-line utility included with Windows designed for efficient and resilient copying of files and directories. It supports multi-threaded copying, resume capabilities, and detailed logging, making it ideal for large file transfers.

Setting Up a Batch Script for Large File Transfers

To streamline large file transfers using Robocopy, you can create a simple batch script. This script prompts you to specify source and destination directories, then executes Robocopy with parameters optimized for speed and reliability.

Below is an example of such a script:

“`batch
@echo off
set “source=”
set “destination=”
set “log_file=robocopy_log.txt”

:: — Safety Check —
if /i “%source%” == “%destination%” (
echo Error: The source and destination folders cannot be the same.
goto :end
)

echo Starting large file copy from “%source%” to “%destination%”…
echo.

:: Robocopy command with a high thread count for speed
robocopy “%source%” “%destination%” /S /E /Z /MT:64 /V /NP /TEE /LOG+:”%log_file%”

echo.
echo Copy process finished.
echo Check %log_file% for details.

:end
pause
“`

Customizing the Script

1. Save the above code as a .bat file, for example, large-file-transfer.bat.
2. Before running, open the script in a text editor.
3. Replace the empty set "source=" and set "destination=" lines with your specific directory paths, like:

“`