SanDisk Extreme Portable SSD Speed

I read in some reviews this drive should be around 500MB read / write, I think I’m getting closer to 40, I ran CrystalDiskMark on it with the results below. I’m wondering A) am I getting what I should expect for speeds? B) To get expected speeds will a standard usb-c cable suffice? The original cable was lost so I’m using one from a recent cell phone. Its also a thunderbolt compatible port, but I don’t think that is relevant. If the problem may be the cable, could someone be so kind as to recommend one that should work well for this. Thanks.


CrystalDiskMark 6.0.2 x64 © 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/

  • MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]

  • KB = 1000 bytes, KiB = 1024 bytes

    Sequential Read (Q= 32,T= 1) : 39.949 MB/s
    Sequential Write (Q= 32,T= 1) : 43.698 MB/s
    Random Read 4KiB (Q= 8,T= 8) : 27.784 MB/s [ 6783.2 IOPS]
    Random Write 4KiB (Q= 8,T= 8) : 26.475 MB/s [ 6463.6 IOPS]
    Random Read 4KiB (Q= 32,T= 1) : 27.209 MB/s [ 6642.8 IOPS]
    Random Write 4KiB (Q= 32,T= 1) : 26.432 MB/s [ 6453.1 IOPS]
    Random Read 4KiB (Q= 1,T= 1) : 11.987 MB/s [ 2926.5 IOPS]
    Random Write 4KiB (Q= 1,T= 1) : 15.307 MB/s [ 3737.1 IOPS]

    Test : 100 MiB [D: 79.3% (738.3/931.5 GiB)] (x5) [Interval=5 sec]
    Date : 2020/07/13 2:55:00
    OS : Windows 10 Professional [10.0 Build 19041] (x64)