How we test


Our bench­marks were run on our test rig which uses Win­dows 10 Pro 64-bit. On the in­side, it has a 3.5GHz In­tel Core i7 4770k pro­ces­sor, 16GB (1600MHz) RAM, an In­tel DZ87KLT75K Haswell Z87 mother­board and an AMD Radeon R9 390 graph­ics card.

When con­duct­ing our tests, we plugged in our por­ta­ble stor­age drives into one of our mother­board’s rear USB 3.0 ports. Like the vast ma­jor­ity of PCs and lap­tops, it does not sup­port USB 3.1 Gen 2, how­ever, Gen 1 ports should (the­o­ret­i­cally) be able to han­dle up to 625MB/s and none of the drives on test is rated be­yond 550MB/s.

We used Crys­talDiskMark 64-bit to test each drive’s speed. We se­lected 1GB test files and three test passes in order to de­ter­mine both se­quen­tial and 4KB per­for­mance

Where a drive could be con­nected to a phone or tablet, we did so an in­stalled any rel­e­vant An­droid or iOS apps.

The price per gi­ga­byte for each of the drives in this group test was cal­cu­lated on real-world stor­age.

Se­quen­tial read

Se­quen­tial write

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