Easiest to see images in grid presentation instead of list.
Folders are very helpful to organize content of images and documents. Choose Create Folder. Once named/saved, drag Use bulk edit!
Choose Media > Add New > Select Files
You can choose more than one image to upload
Highlight images and Choose Open or drag images into rectangle.
TO MAKE A PICTURE BE THE FOLDER COVER
Choose a picture and on right sidebar, check the box for Folder cover. There is no save, it’s automatic