I hope you meant images less than 80-100k...
Are the files JPG or some other format.
Some times I have to take the "E" out JPeG, and Tiff files are usually too large.
If there are any errors with your image, the pop up window should mention it after you click the "Upload" button.
below, or Go Advanced
in the quick reply section.
type your text,
Scroll down the the FILES section,
+Drag Files Here or Click to Browse.
I believe that images are limited to 100k or less, so if your image does not load, check the file size, and if possible resize the image to 1000 pixels or less in the maximum dimension, and then try to load it again.