You’ve got the right forum, but possibly nobody has experience of trying to do what you want.

For what it’s worth I don’t think you could do it from with a BAT file on the PC/Server, I think you would need to do it as a two stage process:

1) From the PC (using a BAT file?) copy/move the documents to a folder in the IFS

2) On the iSeries include the IFS folder in your backup/save process to save the folder to the optical drive.

I can’t remember whether or not you can directly save documents from NFS mounted storage to an optical drive or not, but if so that may be an alternative route – i.e. mount some disks as NFS storage and save your documents there for backing up by the iSeries.

Hope it helps, and good luck.

Jonathan