1. 4everForever's Avatar
    Dear all,

    I insert a sandisk extreme pro class 10 memory card with 100 mbps read speed and 90 mbps write speed. Then I run the Crystaldiskmark app to test the speed of the memory card, it shows the card has only approximately 9.7 mbps read and write speed.

    Then I tried to insert another sandisk ultra class 10 memory card, it shows the similar result.

    Is this normal? Or is the card reader of my surface go faulty? Both cards were formatted as NTFS (I tried exFAT as well) and I confirmed both cards are genuine.
    Last edited by 4everForever; 10-05-2018 at 10:49 AM.
    10-05-2018 10:37 AM
  2. HeyCori's Avatar
    Definitely sounds faulty.
    Laura Knotek and TechFreak1 like this.
    10-05-2018 03:36 PM
  3. alnajmi's Avatar
    Definitely faulty unit! I get around 90 read and 85 write speed with my PYN and Samsung 128gb and 256gb.
    HeyCori likes this.
    10-08-2018 08:32 AM
  4. 4everForever's Avatar
    Thanks for the replies, already contacted Microsoft to arrange for a replacement unit.
    HeyCori likes this.
    10-08-2018 09:27 AM

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