xcopy /C/H/R/S/Y c:\ d:\ /C = Continues copying even if errors occur /H = Copies hidden and system files also /R = Overwrites read-only files /S = Copies directories and subdirectories /Y = Overwrites existing files without asking
robocopy c:\ d:\ /MIR /R:0 /W:0 /MIR = Mirror entire directory structure (can use /E instead) /R:0 = 0 retries for read/write failures /W:0 = 0 seconds between retries
Credit to: https://djlab.com/2010/12/windows-ignore-errors-with-xcopy-and-robocopy/