Usb3 real speed for transferring data

rimartic

Honorable
Sep 5, 2012
7
0
10,510
0
Hi as I've asked before , I have a lenovo y700 gaming laptop
I have several 2.5" and 3.5" hdd's and I usually transfer files between laptop and those hdd's
My laptop has a ssd 256 m2 as main hard drive for c:\ and also downloaded multimedia files with idm and second hdd (1TB hitachi 5400rpm2.5")
my problem is when I connect even one external hdd 3.5"to one of two usb3 ports for copying multimedia files from ssd m2 on them , the max transfer speed is around 75 to 85 and A few times around 90mbs
Don't you think this is low and it should be higher?
And what should I do about it ?!
I mean generally what's the best way to increase usb ports transferring data speed to maximum?
Thx
 

Barty1884

Admirable
Moderator
The USB3 "theoretical" speeds are irrelevant. You're only going to be as 'fast' as your slowest component.

Just picking a 2.5" Hitachi as an idea..... 5400rpm drive.
http://hdd.userbenchmark.com/SpeedTest/72/HGST-HTS541010A9E680

Anywhere from 50MB/s to 85 seems to be the 'norm'.

The fact USB 3.0 theoretically do 640MBps doesn't matter in this case.


IF you were attempting to transfer via USB2.0, the port would matter. It's theoretical max is ~60MB/s, so would be a limiting factor.
 

Barty1884

Admirable
Moderator
The USB3 "theoretical" speeds are irrelevant. You're only going to be as 'fast' as your slowest component.

Just picking a 2.5" Hitachi as an idea..... 5400rpm drive.
http://hdd.userbenchmark.com/SpeedTest/72/HGST-HTS541010A9E680

Anywhere from 50MB/s to 85 seems to be the 'norm'.

The fact USB 3.0 theoretically do 640MBps doesn't matter in this case.


IF you were attempting to transfer via USB2.0, the port would matter. It's theoretical max is ~60MB/s, so would be a limiting factor.
 

robert600

Distinguished
Jan 19, 2012
608
0
19,260
109
"my problem is when I connect even one external hdd 3.5"to one of two usb3 ports"

It sounds to me like the connecting cable etc. you are using is usb2.0 - you may need to put those external drives in a usb3.0 case
 
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