External SSD

Discussion in 'Buying Tips and Advice' started by Po Dameron, Nov 1, 2017.

  1. Po Dameron macrumors newbie

    Apr 10, 2017
    hi, I am thinking of either getting a Samsung T5 USB C SSD or a Samsung evo 850 in a satechi USB C enclosure.

    The T5 is sleeker but the evo is much cheaper per gb. Any downside? The enclosure supports UASP which is a real plus.
  2. Fishrrman, Nov 1, 2017
    Last edited: Nov 1, 2017

    Fishrrman macrumors P6


    Feb 20, 2009
    The T5 -might- measure a little faster -- this depends on what type of Mac you're connecting it to.

    I've used enough USB3 enclosures/docks/dongles to know what to expect from them.
    EVO in a USB3 enclosure which supports UASP will yield reads of 430mbps and writes probably between 300-350mbps.

    Can't give real numbers regarding the T5, as I don't own one.
    If you have a Mac with USB-c, I think you will see modestly faster performance using that port. Nothing dramatic.
  3. ZapNZs, Nov 1, 2017
    Last edited: Nov 1, 2017

    ZapNZs macrumors 68020


    Jan 23, 2017
    Are you using this on a retina MacBook, a 2016-2017 MacBook Pro, or something else?

    The EVO has a five year warranty where as IIRC the T5 only has three. With the Evo, a good 10gbps USB 3.1 gen 2 enclosure/cable, and a 2016-2017 MBP, sustained read speeds around 500-550 MB/s and write speeds around 450-500 MB/s in a benchmark should be doable (obviously real-world working speeds will be much slower given how poor of an approximation a sustained benchmark is for this.) IIRC, the T5 will have similar performance (when connected to a MBP that supports 3.1 gen 2, of course.) Obviously, if the MBP (or rMB/iMac/Mac Mini) only supports 5Gbps 3.1 gen 1, speeds will be a good bit slower.)

    The Satechi is a gen 2 enclosure. StarTech and Mediasonic also have gen 2 offerings. The Oyen Digital USB-C enclosure might also be worth checking out. It is also a 3.1 gen 2 enclosure. To date, their MiniPro is the best enclosure line I have used anywhere remotely near its price range. (Mediasonic and Oyen also have 3.1 gen 2 + RAID 0 enclosures for those needing the absolute max out of 3.1 gen 2 who are willing to accept the risks associated with striping.)
  4. Po Dameron thread starter macrumors newbie

    Apr 10, 2017
    I will be using it with prob a 2017 iMac. Thanks for mentioning the other models, will look into them. Cheers.
  5. Moonjumper macrumors 68000


    Jun 20, 2009
    Lincoln, UK
    The advantage of the T5 is size. The advantage of the Evo is cost. Are you going to be carrying it around? It sounds like you won't, which makes the choice easier.
  6. ZapNZs macrumors 68020


    Jan 23, 2017
    You have 10 Gbps 3.1 gen 2 over type-C. While USB-A 3.1 gen 2 does exist, IIRC, the type-A ports on the iMac are still 5 Gbps 3.1 gen 1. So provided you are using a gen 2 enclosure over type-C, you should get excellent speeds from the EVO.

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