Used this product on my MacAir as a storage device for my photo library. This isn't recommended by Apple, but I used a 64GB flash drive and it worked fine. Needing more space, I switched to a 128 gig flash drive. Didn't work on my Mac. I even reformatted the flash drive in a Mac specific format. Drives work fine on my PC but not on Mac for storing photos. I ended up switching to an external hard drive for my Mac and it works great. I don't know if it was a transfer speed issue or something else. I will be using 128GB sticks with my computer and they will be fine.
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