I have had several versions of Photoshop Elements. My current version is 2019. In the past, whenever I plugged my card reader into my desktop, it would autostart Photoshop Elements. This feature appears to have stopped working. I have made no changes to my hardware or operating system. I can go in and physically find the memory card and copy the files to the folder, but this was a really handy feature.
Autostart is a feature of Windows. You can assign a function to a device when you plug in to the computer. The help docs from Windows did help me to disable that feature when I plugged in my smartphone and that automatically resulted in an attempted session to download and catalog many thousands photos into my catalog! There is nothing you can do about autostart in Elements itself.