Google can't search your computer unless there is something new or a program to that specifically.., but if you posted the hi res online,it could find those.
I know Google retired a program called Picasa - when installed it would search your files for all images on your computer and find them..
I think there are a few other photo programs that will find images on your computer and place them into the program for you, I can't think of the names of those. Probably some new ones I don't know about..
Aren't most of your images stored in your pictures/photos folders?
you should be able to sort by file size , to find the hi res..
Or google -