ArdentMan

@Echo Off&SetLocal EnableDelayedExpansion
For %%I IN (局域网的\\abc\test\b.dat) Do (
  For %%J IN (d:\abc\test\a.dat) Do (
    Set /A Num=%%~zI-%%~zJ
    If !Num! GEQ 10240 Copy /Y "%%I" "%%J"
  )
)
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