Storage forum


USB3 speed_theory vs.practice

Data transfer speeds via USB port are very different. It certainly related on system settings (win7_64bit) as well as file type, USB2/3, etc.
My question is related to USB3 transfer, which should be the fastest, but sometimes it's frustratingly slow. I tried several new USB3 external hdds (WDpassport edge 500GB, Adata HV620_500), various flash memory. At the beginning of the big file transfer (1GB), it sets off in cca90MB/sec, then it slows down to 4KB/s. It's somehow improve? Update drivers, or something? I use both Windows Explorer or Total Commander, it's the same.
Thanks for your advice or tip for acceleration.

Discussion is locked
You are posting a reply to: USB3 speed_theory vs.practice
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: USB3 speed_theory vs.practice
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.

All Answers

Collapse -
So from what you said,

In reply to: USB3 speed_theory vs.practice

I would say maybe the issue is not just "USB3", but some other bottleneck. Personally I have not use any usb3 so I can't say if that's normal but I have used sata vs usb2 and sata was definitely faster (my experience).

Just thinking out loud, maybe a new usb3 controller if you have the socket for it (I notice they are not that expensive).

Collapse -
I find the slowest copy to be with Windows Explorer.

In reply to: USB3 speed_theory vs.practice

For me, a command line copy is the fastest then after that RoadKil's Unstoppable Copier. I won't expand too much here but I think it's how it serializes the copy. USB of any version seems to like us copying one file at a time.

Collapse -
The numbers you gave sound right. until that 4K

In reply to: I find the slowest copy to be with Windows Explorer.

Popular Forums

Computer Newbies 10,686 discussions
Computer Help 54,365 discussions
Laptops 21,181 discussions
Networking & Wireless 16,313 discussions
Phones 17,137 discussions
Security 31,287 discussions
TVs & Home Theaters 22,101 discussions
Windows 7 8,164 discussions
Windows 10 2,657 discussions


This one tip will help you sleep better tonight

A few seconds are all you need to get a better night's rest.