robocopy — Append outputIT technician command center
● ITSign inMembers
Windows CMD · Windows Command Line

robocopy — Append output

Append command output and errors to an existing log. Base task: Copy and synchronize directory trees.

Copy-ready commandrobocopy — Append output
robocopy C:\Source D:\Backup /MIR /R:2 /W:5 /LOG:backup.log >> command-results.txt 2>&1
Production warning

Review destructive switches before running commands that modify files or services.

Requirements and permissions

Requirements
Windows 10/11 or Windows Server
Permissions
Varies by command
Last reviewed
2026-08-01

Examples

Append output

Append command output and errors to an existing log.

robocopy C:\Source D:\Backup /MIR /R:2 /W:5 /LOG:backup.log >> command-results.txt 2>&1

Common errors

Command or option not supported

Confirm the installed platform version supports the base command and the added output or wrapper option.

Access denied or insufficient privileges

Run with the administrative role or delegated permission required by the underlying command.