New SSD not making it up to speed, please help!

Hi there,
So I just bought a brand new WD Blue SSD on Amazon, here is the link to the one I bought…

I bought it to add it into an external SSD enclosure to use with my laptop for extra storage, which here is the link to the one I bought…

The problem is, I don’t have a USB-C plug-in on my laptop, and the cord that that enclosure comes with is just USB-C to USB-C, it does not include a USB-C to USB-A. So because of this, I bought an adapter, USB-C Female to USB-A Male. I can post link in the comments because this won’t let me add more links :frowning:

I put it all together successfully, formatted it, my laptop recognized it, all is well. Then I decided to do a speed test on it with CrystalDiskMark, and it was pathetic. Here is that test…
Capture111

Compared to my laptop’s SSD that it came with test…
Capture222

I am thinking it may be because of the adapter that I had to purchase. I wonder if there is a USB-A to USB-C cord that I can safely use for this enclosure? Or is it even an issue with the adapter? I don’t want to have to purchase a whole new enclosure, but if it comes to that, I will take suggestions. Please help! I was super excited about this, I thought it was going to be such a great upgrade, and it is such a bummer that it is not working how it should be.

This is the adapter

I just tried using a random USB-A to USB-C cable we had lying around the house, instead of the adapter with the USB-C to USB-C that came with the enclosure, and I got about the same results :confused:

Hi @clerbird321,

Please contact the respective WD Technical Support team for best assistance and troubleshooting:
https://support-en.wd.com/app/ask

Note: If you already raised an inquiry, the team will respond to you within 24-48 business hours.

We are getting VERY similar (~40MB/s) results here, with the WD Blue 500MB ATA version WDS500G2B0A.
We tried 3 different adapters (Oyen, Sabrent, Orico) using their supplied USB3 cables, connected directly to USB3 port of Mac Mini 2012 running Mojave OS.
Same issue with both WD Blue that we bought in last 2 weeks. Tried 3 different Mac speed-test programs. Even old “My Book for Mac” WD external drive with 7200rpm spinning disk gets around 100 MB/s on same computer.
Disappointed !!!