Review on 📀 Renewed WD Blue 1TB Mobile HDD - 5400 RPM SATA 6 Gb/s 128MB Cache 2.5 Inch - WD10SPZX by En En Shiu ᠌

You should not measure the performance of an empty disk, there the read speed will be more than 250 MB / s, because. for empty and TRIM sections, it immediately returns zeros without physically reading them. If you fill the disk and immediately read it for the test, then the result will also be good, because. most likely the recorded data will lie nearby. But if you arrange a random write in a random order to the disk, and then conduct a linear read test, the result will unpleasantly surprise you. (on the screenshot I checked only the first 100GB, it shows that the first 40GB are filled tightly, and then - mostly empty space with occasional files)