Well, it seems to me that the reader reloads all the books if I only add 1 book. I had thought (this morning) that the reader loads all books not only upon putting in the newly loaded sd card but also upon turning it off and on. But it seems it doesn't.
But it's annoying to wait that long to load the 2-3 thousand books ~ it was at least like 10 minutes of seeing those arrows circle.
and yeah, I bought mine because of the Target Clearance sale.