in batch mode ?
then assign a shared NT directory to the 400 :
in the 400, type MD /QNTC/myserver
required : your 400 account+password is a valid NT account+password.
this makes you able to read any data residing on the NT server directly within your CLP with commands CPYFRMSTMF, CPYFRMIMPF, …
remark : if your 400 is in the same domain than the NT server (I don’t know what does that means), the attachment is done by the IPL (it is promised by an IBM doc I have lost).
in interactive mode ?
install iseries client acces, declare the netserver, share an IFS folder : then you can see it with the PC explorer. Just drap and drop your file in the ifs folder.
In short, you copy to the iSeries the same way you would copy to another Win2K system — drag and drop to a shared directory or issue a Windows command to do the copy.
Your iSeries can share directories out to the Windows Network Neighborhood as can Linux systems, Windows systems and others.
Locate an appropriate share or create one. Or put the .CSV files into a shared directory on your Win2K PC and run commands on the iSeries to copy from there. The iSeries can access shares just like your PC can.