Very slow uploading photos to Catalog

I have not had this issue before. I uploaded or imported from my SD card through my SD card slot on my Dell computer about 1600 photos directly to my catalog to work on. This is a Windows 10 computer with a 500 gb C drive and a 2 T D drive where the photos are stored. The C drive is just for fast startup as it is a SSD. The 2 T drive is mechanical. It took approx. 2 hours to upload those photos. It was painstakenly slow! I had about that same amount that I uploaded about a month ago without issue. The only changes I have made to the computer was the installation of a new monitor. I just tried the card in my laptop to see if it would upload faster or not and it is much faster but I was not uploading to the catalog in Elements on my laptop, just to a file on desktop. Any ideas of what might be going on?