Seagate Desktop HDD 4 TB vs. Western Digital WD Black 4 TB Hard Drive Review
Access Time
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Access time is another important measurement. It measures the time the storage device delays to start delivering data after the computer has asked for given data. It is measured in the order of milliseconds (ms, which are equal to 0.001 s); the lower this value, the better.
In this test, the WD Black 4 TB recorded the shortest access time, which was 26% quicker than the Seagate Desktop HDD 4 TB.

