Single FTP user goodput traffic is very low about 60Mbps, need to be increased.
By default setting under FTP server profile, Burst Size is 15000 bytes and Burst Interval is 2 ms, then current FTP session goodput=15000*8*(1000/2)=60Mbps.
If want to get more FTP bandwidth, increase Burst Size or decrease Burst Interval. For example: set Burst Size to be 25000 and Burst Interval to be 1 ms, then current FTP session goodput=25000*8*(1000/1)=200Mbps.
For more, Burst Size=15000 bytes and Burst Interval=2 ms is the default setting for client side, need change it if want to get more FTP put traffic. For example:
1 ftp://192.168.1.1/file.txt <USER=anonymous PASSWD=anonymous> <MODE=BINARY> <BURST_SIZE = 25000> <BURST_INTERVAL=1>