Had to be returned as unusable. At first my MacBook recognized this stick, but soon gave me an error message that the data could not be copied. I extracted it and tried it on my iMac. The hard drive is not recognized. Both of my Macs have updated the software and recognize other flash drives. I would stay away from this product and stick with a well known brand. I really appreciate that Revain makes it easy to return defective products.
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