This is such a specialized problem, and have tried many things but none have worked. I have embroidery software that allows me to see icons of designs, rather than names of files. When I go to scroll down the computer slows down to a stop and that cycling blue circle comes and goes on for a long time. Sometimes the computer goes black and then I have to go find the external hard drive again and start over. Sometimes it just sits and swirls. Either way I cannot get to the last of the files in any category. I thought it might be my anti-virus software, so tried without, same. I updated my embroidery software and iconizer to see if that was the issue, nope, same. I am at a loss.