Hi,
From almost 10 years I am buying SD card readers to connect memory cards to PC. Always, these never lasts more than four to eight months. After that it stops working. I don't know why? All of the card reader I used from China and costs not more than $ 1 or $2. I buy same grade of readers because this is the only one option here. What may cause such failure? USB has nice power source of 5V and maybe "semiconductor" inside the readers never degrades after few months of use. I want to read your experience.
Same way I used two USB sound cards of around $3 just few weeks. But my USB Flash drive (pendrive) are working in same PC from years!