ESD400 Por­ta­ble SSD 512GB

A drive that shows the cost per gi­ga­byte of flash stor­age is fall­ing

Mac Format - - RATED - Very good price per gi­ga­byte Good trans­fer rates on av­er­age Ap­peal­ing size and weight Not the over­all fastest mini SSD

The ESD400 is com­pact and speedy, and it packs in plenty of ca­pac­ity at a com­pet­i­tive price.

£202 Man­u­fac­turer Tran­scend In­for­ma­tion Inc, uk.tran­scend-info.com Di­men­sions 92x62x10.5mm Weight 56g Ports 1xUSB 3.0 In­cluded USB 3.0 ca­ble and cloth travel pouch This por­ta­ble SSD doesn’t take the hon­our of the small­est and light­est drive of its kind from Freecom’s mSSD (see MacFor­mat 275), yet when weigh­ing al­most dou­ble amounts to just 56g, it’s still pock­etable. Tran­scend has opted for a plas­tic en­clo­sure with rounded edges. And like the mSSD, you need to carry the ca­ble to con­nect it.

A USB 3.0 port gives you the best per­for­mance from the drive, which Tran­scend says can read data at up to 410MB/sec (we ac­tu­ally mea­sured a peak rate of 435.9MB/sec). The drive peaked at 366.9MB/sec when writ­ing, rather than the 380MB/sec stated. Av­er­ages when read­ing and writ­ing se­quen­tially were 363.3MB/ sec and 309.4MB/sec – sim­i­lar to Freecom’s drive.

In the tough­est test – ran­domly trans­fer­ring small amounts of data – the ESD400 is slightly slower than the mSSD. Its mean av­er­ages of 138.1MB/sec when read­ing and 196.8MB/sec when writ­ing, re­spec­tively, are still fast.

The ESD400 comes in larger ca­pac­i­ties than the mSSD with­out the larger price tag (Ama­zon sold the 512GB model for £202, and the 256GB mSSD for £208). That com­pares well to a 500GB mSATA drive (around £185) and an en­clo­sure for it (around £20). Alan Stone­bridge

The ESD400 might look like

a tra­di­tional 2.5in drive, but check out the num­bers.

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