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Question about USB 2 transfer speeds.

mrtom · 2020-08-28 17:28:45

Question about USB 2 transfer speeds (W7 i3 4Gb.) Copying a file (Mp4 -935Mb ) from the laptop to a Micro SD card via adapter to a USB 2 port. Speed settled at 8 MB/second. Speed seems slow for USB 2 . Have attached image with SD spec + Why is it so slow?

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28-08-2020 6:28pm

#1

mrtom

Registered Users Posts: 679 ✭✭✭

Join Date: July 2009

Posts: 443

Question about USB 2 transfer speeds (W7 i3 4Gb.)
Copying a file (Mp4 -935Mb ) from the laptop to a Micro SD card via adapter to a USB 2 port.
Speed settled at 8 MB/second. Speed seems slow for USB 2 .
Have attached image with SD spec +

Why is it so slow?

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#2 28-08-2020 11:33pm
smuggler.ie

Registered Users Posts: 4,128 ✭✭✭

Join Date: October 2015

Posts: 4078

mrtom wrote: »

Question about USB 2 transfer speeds (W7 i3 4Gb.)
Copying a file (Mp4 -935Mb ) from the laptop to a Micro SD card via adapter to a USB 2 port.
Speed settled at 8 MB/second. Speed seems slow for USB 2 .
Have attached image with SD spec +

Why is it so slow?

This is not USB2 limitation. And you have this many variables there
SD card min sequential write speed 10MB/s(theoretical), but who are "platinet", how much they adhere to standards and where the product come from, what cable/adapter, so on...
I would not be surprised nor put to much expectations in to it

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