I have a Macbook Pro with USB-C ports. I bought this adapter set because of the good reviews. After receiving them, I tried testing them with one of my flash drives. Sometimes he showed up and sometimes he refused to show up. I had my doubts and tried to search the internet if it is related to the Mac problem and even tried some solutions to fix the "problem". None worked. Finally, after comparing the feel of the Macbook power adapter when plugged in, I found that these Basesailor adapters were too tight, making it difficult to fully insert them to make good contact. So I went to my local Bestbuy store and bought one of their USB CA adapters. It went in with a slight click so I know it's plugged in and the flash drive showed up as expected every time. Did I get a lemon? If one of these works, I would say the other is a defective device. But since neither works, I'd say it's a design issue. I'm not sure how they get such good reviews. I can only give them the lowest rating.
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