When you cancelled the import, it must have imported some of the images by that time.
Choose Previous Import under Catalog Panel in Library module to see which all images have been imported.
And when you go to Import again, choose New Photos which will display the left over images to be imported.
Thank you I did that. It shows that all were imported except the last 4 images are still in my drive. Theses images are not showing in the Catalog Panel Folder for this job. How can I add them if they are not showing in the folder?
you need to go to import again > choose the same folder as the source location > choose New Photos at top and wait till it shows just those 4 photos to be imported > click on Import
If it does not show those four images under the New Photos to be imported, it means they have been already imported and you might have to do a search for those specific images within your Lightroom Catalog.
Thank you. I figured it all out!
Great! Glad to know!