Card reader for V60/280/210 mb/s SD card - slow download

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I've just bought myself 2x lexar 1800x memory cards for the sole purpose of improving transfer speeds to my laptop. Moving from V30 Sandisk cars where I get about 80 mb/s download.

Just testing these cards I am only getting the same - but the advertised speed is 210mb/s download - so currently I've spend £70+ for no improvement!

The cards seem to have a second row of connections, but looking at my reader(s) I am not sure they are utilising this, and therefore my duduction is that its the card reader causing the slow transfer speed?

In theory a 100gb file (1,000,000 MB) @ 210mb/s should be able to download in 8 minutes - but I am only getting 80 mb/s so over 20 minutes. 2 cards thats 40+ minutes to download what i should be able to in 16!

I've tried in both my built in SD card reader (Which is on a new Lenovo thinkbook bought a month ago..... and on my USB C multi card reader which can download my CF express cards at lightning speed, so its not the cable/bus thats the problem, and the card reader can transfer the CF Bs at lightning speed (but i know they are a LOT faster). Even so I was expecting to at least get the advertised speed for the SD cards?

Any suggestions? Is a new card reader in order?
 
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IMO you need a UHS II version reader

FWIW I bought a Kingston brand reader adaptor when I started to use UHS II SD cards. I plug this into my built-in USB 3.1 ports to get full speeds

PS unless your new Lenovo Thinkbook explicitly states it's built in SD card reader is UHS II then it likely isn't!

PPS oh and one thing to be aware of is that to utilise the fastest read speed possible is that your USB ports on the Lenovo or any other computer is USB 3.1 and not USB 2

So check the specs of both your computer and the USB C multi card reader.
 
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Box Brownie said:
IMO you need a UHS II version reader

FWIW I bought a Kingston brand reader adaptor when I started to use UHS II SD cards. I plug this into my built-in USB 3.1 ports to get full speeds

PS unless your new Lenovo Thinkbook explicitly states it's built in SD card reader is UHS II then it likely isn't!

PPS oh and one thing to be aware of is that to utilise the fastest read speed possible is that your USB ports on the Lenovo or any other computer is USB 3.1 and not USB 2

So check the specs of both your computer and the USB C multi card reader.
Click to expand...

Thanks, I think the laptop with thunderbolt and USBA/C at 10gbs should to the trick so suspect its the card reader


USB A @ 10GBs
2x Thunderbolt™ 4

From the above link
 
A_S said:
Thanks, I think the laptop with thunderbolt and USBA/C at 10gbs should to the trick so suspect its the card reader


USB A @ 10GBs
2x Thunderbolt™ 4

From the above link
Click to expand...
USB A is the larger type of connection compared others like USB C

In regard to the way Lenovo describe their ports this may be helpful in 'seeing' them in USB standard versions

Screenshot_20250227-010907.png
 
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