thibaulthalpern: Check your Rx KliiK eyewear,
Inserted SD cards does not draw power directly, Perhaps if you loaded a 16GB
card and had the reader index 16GB's worth of content, that might explain your
mystery. Many of us would have noticed a problem by now if it were a problem.
On the other hand, if your card is 16MB, and had thousands of small files to index
the above would also apply. If your SD is faulty, the reader could also be having
problems indexing too. try a new (branded) card to verify.