hi dhilleep,
you can go for another option also if you have NFS ,
use processing mode as "Set to Read only"
or
go for Run OS commands,
if it is FTP then go for archive it's a best option
for SFTP you can go for adapter module to archive the file,
check below thread that may help:
http://scn.sap.com/thread/2001133
Regrds
Gagan