I bought this particular SSD to use as an external boot disk for my 2017 iMac i5 5K 27 inch. It was recommended by the software publisher Carbon Copy Cloner, which I used to clone my internal boot. drive to this SSD. I first reformatted the SSD and then cloned my internal boot drive to it according to the instructions. I was very disappointed with the performance, it was very slow especially at startup. The next day I went through all the steps again and can say that it's running pretty fast using the computer. It still seems to be taking a little longer for the computer to boot up instead of the internal drive, but not too slow. Bottom line I think it's worth the money for the price. Also, the seller was very responsive.
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