Positive and strongly correlated, as long as the part is not a fake from a fly-by-night shop. I personally buy SD cards and USB memory sticks from bhphotovideo

Positive and strongly correlated, as long as the part is not a fake from a fly-by-night shop. I personally buy SD cards and USB memory sticks from bhphotovideo, whose customers (pro and enthusiast photographers), care greatly about not losing their images, so B&H watches their suppliers closely. My 2c.