[Question] Iperf3 only sending 10% of file? -F switch

Does anyone use Iperf to send a file instead of random data? In my case I'd like to transfer a 30mb excel file to a server. Using the -F switch works, however its only sending 10% o the file. Anyone have success with this?

Output looks like this:

C:\iperf-3.1.3-win64>iperf3.exe -c myserver -F testfile.xlsx Connecting to host myserver, port 5201 [ 4] local 10.6.0.2 port 64793 connected to myserver port 5201 [ ID] Interval Transfer Bandwidth [ 4] 0.00-0.67 sec 3.25 MBytes 40.6 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth [ 4] 0.00-0.67 sec 3.25 MBytes 40.6 Mbits/sec sender Sent 3.25 MByte / 31.1 MByte (10%) of testfile.xlsx [ 4] 0.00-0.67 sec 3.25 MBytes 40.6 Mbits/sec receiver iperf Done. 

Thanks for reading.