Is there any thumb rule to estimate files transfer between 2 computers connected on the same gigabyte switch.
Testing transfer using iperf3, I got 980 GIB/s ( No disk copy I presume )
Transferring 23000 files for an amount of 3,1 GIB I got 9 GIB/s ( roughly 5 minutes ).
With lots of small files it also depends on your hardware. A SSD with fast access times and high IOPS rate will be much faster than a HDD. So there is no rule of thumb.