Samsung 700T: boots YES, console YES, hi-res X NO

[otropogo]

I've been unable to access my 64GB LEXAR SDXC flash card under Knoppix 7.2 64- bit. I'm using an ASUS N550JV laptop, and in the internal SD/XC slot Knoppix simply doesn't acknowldege the card. In a Verbatim USB 3.0 card reader, "sdg1" appears briefly, then disappears. If I happen to click on it before it vanishes, a popup reports "invalid directory". Very frustrating. In an older Toshiba A500, I was able to access the card in the internal slot with Knoppix 7.2.