Windows 10: I'm getting very inconsistent transfer speeds on a USB 3.0.

As you can see from the images, i am getting these moments where the speed drops to 0 for about 10 seconds then picks back up to full speed again. It reminds me of a 'saw blade' or 'thread' lol.




:)

 

USB 3.0 transfer speed drops to 0 only on one port. USB port and external drive are NOT defective.

I have a Dell XPS 13 laptop with two USB 3.0 ports. I connect a Seagate expansion drive to the left USB port and transfer a 4GB test file. It transfers about 1GB at 150MB/s and then transfer speed drops to 0. Then it picks up again after 3-4minutes, then
drops again intermittently.

I connect the same Seagate drive to the right USB port. The same 4GB file transfers with a constant speed of approximately 150MB/s. Thus the Seagate drive is not defective. Perhaps the left USB port is defective.

I connect a Sandisk 128GB flash drive to the left USB port (that is now suspected defective). It transfers the same 4GB file with constant 130MB/s speed, no speed drops!

Each step is reproducible 10x.

I am out of my wits here.

 

USB transfer speed restricted to 1MBps

Thanks for showing interest in my issue.

1. MP3, movies, and all sorts of files.

2. Computer to Pen drive & vice-versa.

3. No, no updates.

 

USB transfer speed restricted to 1MBps

Hi,

Allow us to ask the following questions so we can properly address your concern:

• What type of files were you trying to transfer?
• When you say USB transfer speed, are you referring to the speed when transferring the files from that computer to another device, or the other way around?
  
• Did you do any updates to your computer prior to this issue? Was it working fine before?

We will wait for your reply.

Regards.