I have a 25 GB limit and have been uploading JPEGs to Google Photos.
I have set it in Google Photos options so they are uploaded as High quality (free unlimited storage), and verified that they are in fact less than 16mp (4096x4096) once uploaded.
However I see now that I am using 88% of my quota (before I started uploading JPEGs I was using about 3%).
Does anyone know if this is a bug or am I doing something wrong?
FWIW, I am using the jfriedl Picasa plugin to upload the JPEGs from Adobe Lightroom 6.