What's the upper read limit for the sddr-33 Securemate reader??

Since there are no published specs on this reader I’ll pose the question here. I can read “small” mb cards, but I can’t read 32gb cards. So does anyone happen to know what the upper range is for this reader?

I’ll answer my own question since I now know–this and older “card” readers will not read the 32gb sd’s. I have an old dazzle that won’t read them either. A new, cheap $5 sd reader did the trick. There is some upper limitation on the securemate, but I don’t know what it is…