There is no smaller size I can choose. It took the better part of one day to render all my images. I'm not sure I want to purge the cash and start, again. I can create another cache though, and try that.
They are named Cache0000000001.dat and not .jpg
On another note. If I clicked on a thumbnail it created a file in the new Cache, 4 meg. If I selected Library/ Preview, Render Standard from the drop down menu it checked all the images and didn't do anything, so I'm not sure what the relationship is between the Library and the Cache.
I think the jpg's are in the Catalog and not the Cache. Looking the Catalog, there are thusands and thousands of Folder with, like 2 files in each one. This is more than likely the problem. The organization is ridiculous.