Will it work at 1000Mb/s?

Question

Computer networks

Good day to all!
There is a 10/100 router, a wire goes from it to the 10/100 switch, from the switch to the panel and out through the socket in the room.
There is another small switch in the room (say 4-port, 10/100/1000), and wires go from it to two computers.
the question is, if two computers in this room start exchanging files with each other (we assume that they have network cards - 1gb), will they exchange at the level of a room switch? (i.e. at a speed of 1GB), or will everything go at a speed of 100mb?
What is it for. The task is to organize the fastest possible file exchange between two designers sitting in the same room (one of the designers works in the other's ball, the layouts are saved with an interval of 20-40s)
(maybe there are other solutions to this problem?)

Answer 1

Look at the switch. In theory, modern switches for clients connected on 1G will drive traffic on 1G. But in those days, there were models that, in the presence of connected clients at 100M, switched everyone to 100M.