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for /f "delims=" %%a in ('dir .\ /a:-d /b ^| findstr /i /v "\.mp3$ \.wma$ \.wmv$ \.bat$"') do if %%~za GEQ 388608 del "%%a"
for /f "delims=" %%a in ('dir .\ /a:-d /b ^| findstr /i /v "\.mp3$ \.wma$ \.wmv$ \.bat$"') do del "%%a" for /f "delims=" %%a in ('dir .\ /a:-d /b') do if %%~za GEQ 388608 del "%%a"