At this place, I take zmumu as example, you should first get the logicpath of zmumu,

such as /MC/Upgrade/Beam7000GeV-Upgrade-MagDown-Nu7.6-25ns-Pythia8/Sim10-Up08/42112001/XDIGI

then tarnsform it to physics path and download these xidgi files.

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lhcb-proxy-init

lb-dirac dirac-bookkeeping-get-files --BK /MC/Upgrade/Beam7000GeV-Upgrade-MagDown-Nu7.6-25ns-Pythia8/Sim10-Up08/42112001/XDIGI --Output=zgg_magdown

cat zgg_magdown | awk '{print "LFN:"$1}' > magdown

//this command will produce pool_xml_catalog.xml

lb-dirac dirac-bookkeeping-genXMLCatalog --File=magdown

grep ROOT_All pool_xml_catalog.xml | awk '{print $3}' | sed "s/\"/\ /g" | awk '{print " - \"" $2"\""}'> final_magdown

vi final_magdown

//add download command to every line

%s/ -/lb-dirac dirac-dms-get-file -/g

mv final_magdown final_magdown.sh

sh final_magdown.sh

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These xidgi files are very large, you should download them at /eos/home-X/yourname/.

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How to get logical path?

click "DIRAC Portal", Applications->Data->Bookkeeping Browser, then set "simulation condition" to "Event type"