We found directories:
<AGENT DIR>/Root/MANAGER/MAIN and<AGENT DIR>/Root/WAPRD/MAIN with spool output in there.
It's the SAP plugin FTP response files.
The FTP response files are a temporary repository for large data buffers that otherwise would be sent as part of an Automated Frame Message (AFM). When a large data buffer is transferred from SAP, it is placed in a FTP response file. A message is sent to the Workstation or ESP Desktop Client with the path to the file. The location of the FTP response files is defined in the responsedir parameter in the agentparm.txt file.
The default location is ./Root.