SanDisk Extreme GO 64GB write speed problem.

Hello Everyone,

Few days ago I got a new pendrive: SanDisk Extreme Go 64GB USB 3.1 Gen. 1.

I have plugged it into my laptop with USB 3.0 USB and I started testing this pendrive with ATTO Disk Benchmark and CrystalDiskMark.

The average write speed was: 38 - 40 MB/s

The average read speed was: 140 - 145 MB/s

I expected speeds to be:

Write: ~150MB/s

Read: ~200MB/s

I thought that the pendrive was faulty and today I got it replaced with another, new pendrive.

I started testing right after unboxing and speeds are the same as the first penrive I had.

I would like to know what’s wrong, because I saw reviews on the internet and people are getting better write speed than 40MB/s. Also SanDisk is caliming, that the speeds should be higher than 100 MB/s.

I have previous version of this pendrive, SanDisk Extreme USB 3.0 32GB and the speeds are higher than 100 MB/s, so my laptop is fine.

Thank You in advance.

Exactly the same issue here - in a usb 3.0 port. 

Speed test results

sandiskextremego speed test.PNG

just to add to my orignial post 

CPU: i5 4697K

RAM: 8gig DDR3

Motherboard: ASUS Z97-K

OS: Windows 7 64bit

Ports and speed: 

usb 3.0 back - same results as aboev (40 MB/s write speed)

usb 2.0 back - 20MB/s write speed 

usb 3.0 front - same results as aboev (40 MB/s write speed)