How to configure sftp to log the name, location and size of the files transferred
Configure the sshd_config to log information to syslog.

#vi /etc/ssh/sshd_config

Locate the following line:
Subsystem sftp /usr/sbin/sftp-server

Add the following parameters “-l INFO -f AUTH” at the end:

Subsystem sftp /usr/sbin/sftp-server -l INFO -f AUTH

Save the /etc/ssh/sshd_config file.
Configure syslog to record information from sftp-server.

#vi /etc/syslog.conf
Add the following line in syslog.conf /tmp/sftp.log

Save the file /etc/syslog.conf, create the log file and refresh syslogd.

#touch /tmp/sftp.log

#refresh -s syslogd
Restart sshd daemon.

#stopsrc -s sshd

#startsrc -s sshd

NOTE: While stopping and starting sshd, users will not be able create new
connections. Already existing connections will not get disconnected.
To test it out, try the following from an sftp client.

#sftp user@
cd /
put motd

In syslog you should see logged information similar to the one below, it should include the file name and size.

Oct 8 11:29:07 greybso auth|security:info sftp-server[372922]: open “/motd” flags WRITE,CREATE,TRUNCATE mode 0666

Oct 8 11:29:07 greybso auth|security:info sftp-server[372922]: close “/motd” bytes read 0 written 880