USB 3.2 drive seems to be much slower than I’d expect.. why?
I purchased a Seagate One Touch 4TB USB 3.2 (apparently?) drive. Model is STKC4000400. I’m confused because when I check out the specs, it says it supports 3.2 Gen 1, “with speeds up to 10 GB/s”. Now, I of course don’t expect anywhere near that transfer speed, but what I am getting is 140MB/s, which is about the same speed as an older SATA 3 , mechanical drive.
My PC Specs:
Windows 10 Home 64 bit, MSI X570 Tomahawk motherboard (bios completely updated), Ryzen 9 3900X, 32GB RAM.
Drive is plugged into a USB port labelled as “SuperSpeed” and the manual shows it as a 3.2 Gen 2 port. I get 140MB/s. I even tried a 3.2 Gen 1 port, and that was much slower… 28MB/s (Edit: I later tried that port again, and the results were better, so I’m not sure what happened in the original case).
I’ve disabled my antivirus (MalwareBytes) as well as Windows Defender, with no improvement.
One thing that moderately improved things was changing the profile to “Better Performance”. But really all that seems to do is ensure the first 4GB or so copies at a very fast rate (something around 1000MB/s, i’d guess) and then the rest will transfer at that 140MB/s-ish speed.
140MB/s can’t be really what this drive should transfer at, is it? If not, what can I try and do to make this faster? Or is 140MB/s the limitation of the drive, even though it’s USB 3.2?
Benchmarks with Crystal Disk Mark:
SEQ 1MiB (Q= 8, T= 1): 152.508 MB/s [ 145.4 IOPS] < 54624.15 us>
SEQ 1MiB (Q= 1, T= 1): 151.045 MB/s [ 144.0 IOPS] < 6933.70 us>
RND 4KiB (Q= 32, T= 1): 1.349 MB/s [ 329.3 IOPS] < 95070.41 us>
RND 4KiB (Q= 1, T= 1): 0.4** MB/s [ 119.9 IOPS] < 8335.39 us>
SEQ 1MiB (Q= 8, T= 1): 148.059 MB/s [ 141.2 IOPS] < 56248.92 us>
SEQ 1MiB (Q= 1, T= 1): 149.961 MB/s [ 143.0 IOPS] < 6969.90 us>
RND 4KiB (Q= 32, T= 1): 7.200 MB/s [ 1757.8 IOPS] < 18174.63 us>
RND 4KiB (Q= 1, T= 1): 5.148 MB/s [ 1256.8 IOPS] < 792.54 us>
Test: 1 GiB (x5) [I: 0% (0/3726GiB)]
Time: Measure 5 sec / Interval 5 sec
Date: 2021/12/28 12:59:47
OS: Windows 10 [10.0 Build 19044] (x64)