Need help on adapter modules for receiving multiple attachments in SAP AL11 folder

I have a requirement where I need to pick up a ABC.ZIP file from a source directory using SFTP adapter, this ZIP file contains multiple files which I need to extract and send it to SAP AL11 folder . Using unzip module in sender SFTP channel(ASMA properties used), I have unzipped the file and I can see all the attachments in PI (.xsls,.csv,.xml) but when PI sends to SAP AL11 folder using FILE NFS , its just able to send the first attachment content and the file name has the initial ABC.ZIP name.