Slow computer when accessing information from a network

I have a Mac Studio M1 Max with memory 64 GB running Tahoe 26.3.1. The computer itself seems to work great when I am working on items stored on it. When I am trying to access the network of other computers, it is so slow. It has to "think" with the spinning beach ball for approximately 20 seconds until the folder of items loads. Every step that I go it is another 20 seconds. I have had computer network techs here and they have tested all connections and cords between my computer station and others. They are saying it has to be in the computer. Any ideas?