My SanDisk drive is slower than an external hard drive

Desktop SSD SANDISK Desk Drive
1

I bought an external SanDisk Extreme (Western Digital SN580E 2TB: 2000.3 GB) to expand the storage of my laptop (Dell XPS DA14250).

The laptop has an internal 1TB SSD (PVC10 SK hynix 1024GB: 1024.2 GB).

I also have two external HDDs of 5TB and 3TB (WDC WD50NDZW-11A8JS1: 5000.9 GB; ST3000LM016-1N217V: 3000.5 GB).

I ran speed tests with CrystalMark and was surprised that the internal SSD has a great speed (Read: 6,539.11 MB/s; Write: 5,820.46 MB/s).

However, the SanDisk Extreme showed lower speeds than the external hard drives:

SanDisk Extreme:
Read: 44.59 MB/s
Write: 43.33 MB/s

The 5TB hard drive showed higher speeds:
Read: 99.97 MB/s
Write: 99.18 MB/s

And the 3TB drive showed something similar to the SanDisk:
Read: 42.88 MB/s
Write: 43.61 MB/s

The SanDisk Extreme is formatted NTFS.

All external drives are connected via USB-C.

Why is the SanDisk so slow? Did I make a mistake in its settings?

Thank you if anyone can help me.

2

@ManuelJimenez Sounds like the environment is failing back to USB 2.0 speeds.

Have you checked our knowledge base articles?
(Get Support for Your SSDs and Flash Products | Sandisk)

Try this one.

3

Yes

Yes, but I haven’t found anything similar to my problem.
The XPS 14 DA14250 ports are Thunderbolt 4.0 ports with Power Delivery and backward compatibility with USB 3.2, USB 2.0, and Thunderbolt 3.
Therefore, it seems to me that it should have a transfer speed as indicated in: Oracle B2C Service
Although my model is not considered on that page: SDSSDE61-2TOO

Is there any other way for the SDSSDE61-2TOO to have the desired transfer speed?

4

You can first check whether the SanDisk is connected to a USB 3.2 Gen 2 port using a compatible 10 Gbps cable, since USB C only describes the connector and does not guarantee transfer speed. You can also test it on another port and PC, check for firmware updates, and run CrystalDiskInfo to see whether the drive reports any health issues. Since your results are around 40 MB/s, which is unusually slow for an external SSD, try copying one large file and testing again with a different cable before changing the NTFS format. If it still performs that poorly, check whether the drive is genuine and contact SanDisk support because a faulty drive or cable could be the cause.

5

The cable is original and the SSD is registered on the website and is listed as original. I bought it in the US through Amazon, which inspires a lot of confidence.
I already formatted it to NTFS, but it still has this slow transfer speed. Crystal Reports only served to quantify what I feel during work.
The Dell XPS ports are all the same.

I’m going to try another laptop, but from the beginning, on the other laptop, I felt the same slowness. When I transferred all the files to the new laptop, I found time to do the speed tests. Which only confirms my feeling.