I have an older laptop with three USB ports. Two are USB 2.0 and one is a powered USB 3.0. This drive performs slow in the USB 2.0 ports (similar to the posts below) with R/W speeds just over 40 mb/s - nowhere near the advertised rate of up to 500.
When I plug it into the USB 3.0 powered port, however, viola. Not quite 500, but I’ll take a sequential R/W 400 Mb/s on an old machine…
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CrystalDiskMark 6.0.2 x64 (UWP) (C) 2007-2018 hiyohiyo
Crystal Dew World : https://crystalmark.info/
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* 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) : 402.645 MB/s
Sequential Write (Q= 32,T= 1) : 405.312 MB/s
Random Read 4KiB (Q= 8,T= 8) : 64.634 MB/s [ 15779.8 IOPS]
Random Write 4KiB (Q= 8,T= 8) : 63.989 MB/s [ 15622.3 IOPS]
Random Read 4KiB (Q= 32,T= 1) : 28.137 MB/s [ 6869.4 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 22.436 MB/s [ 5477.5 IOPS]
Random Read 4KiB (Q= 1,T= 1) : 12.494 MB/s [ 3050.3 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 14.079 MB/s [ 3437.3 IOPS]
Test : 1024 MiB [E: 16.6% (77.1/465.8 GiB)] (x5) [Interval=5 sec]
Date : 2019/09/13 22:31:22
OS : Windows 10 [10.0 Build 18362] (x64)
