Huge microSD card roundup

[sLowEnd]

https://www.bahjeez.com/the-great-microsd-card-survey/

This guy posted a huge roundup of microSD cards on his blog

Edit: and a one year followup summary

The Great MicroSD Card Survey: One Year Later

It's been exactly one year since I started this project. I've set up 8 machines with close to 70 card readers running around the clock. I'm writing 101 terabytes of data per day. I've written 18 petabytes of data to 181 microSD cards and destroyed 51 of...

www.bahjeez.com

 

[Hardcore Games]

My laptop has integrated MicroSD card on it, my older machines have SD Card slots

So I could more reliability test them if I had the time and inclinations

 

[Ahhzz]

hmmm,. Interesting, thanks

 

[Apocalypsee]

Problem is those fake microSD, everytime I wanted to buy one it always bugs me whether this one is real or fake, one in terms of speed, most importantly fake capacity

 

[SPDIF]

If you choose a good known brand available, then you're good to go. Just don't by them if the price is to good to be true, just use common sense is enough to not have fake ones at home.

Never had fake ones at home in over 30 years...

 

[Hardcore Games]

Fakes are often sold at OEM prices to catch the unwary

 

[Harlow]

I run a program called H2testw designed specifically to detect fake cards. It writes 1GB files to the card, then verifies these files and checks the claimed capacity.

It detected several fake cards I bought on eBay. I test all CF, SD and microSD cards, purchased new or second hand, before trusting them with my files.

Link to author's web site (German)
https://www.heise.de/download/product/h2testw-50539

Link to Sofpedia
https://www.softpedia.com/get/System/System-Miscellaneous/H2testw.shtml/

 

[Ferrum Master]

Best test is boot off your raspberry pi and do real benchmark there without the USB controller/adapter variable... those readers suck.

 

[Hardcore Games]

I use a home brew tester that requires the device to be other than the system volume and otherwise empty

I still am working on it to better determine of the device if 512 byte or 4096 byte sectors etc

 

[inquisitor1]

I dont see UHSII lexar cards there?

ive had fake sandisk cards. that was my naive days when I bought from china my sd cards. not today. I dont buy sandisk/wd today though

 

[Hardcore Games]

I have some old U3 speed SD cards but I need my old P52 to read them as my T14 only uses the small ones

 

[Ahhzz]

I run a program called H2testw designed specifically to detect fake cards. It writes 1GB files to the card, then verifies these files and checks the claimed capacity.

It detected several fake cards I bought on eBay. I test all CF, SD and microSD cards, purchased new or second hand, before trusting them with my files.

Link to author's web site (German)
https://www.heise.de/download/product/h2testw-50539

Link to Sofpedia
https://www.softpedia.com/get/System/System-Miscellaneous/H2testw.shtml/

yup, I've used it before. solid software.

 

[LabRat 891]

The conclusion I walked away with was that:
mSD cards are inherently unreliable,
and the commodity hardware used to interface with them, equally unreliable.

Oh, and that Samsung will be my preferred brand going forward.
A. SanDisk had issues B. Samsung reliably overprovisions their cards.

 

[Ferrum Master]

Oh, and that Samsung will be my preferred brand going forward.
A. SanDisk had issues B. Samsung reliably overprovisions their cards.

New Samsung controller mops the floor with recent Sandisk extremes pros. But For small files... it depends for what you use. Sandisks are more camera oriented with better linear writes, so they work better there, but for app small performance not, Raspberry, current samsungs are better. I have some bench scores on my rpi5 at home with booted nvme vs sam pro and sandisk cards if you wish.

 

[Hardcore Games]

Many SSD products out there use Phison controller logic which is not well known

While Samsung makes their own controller, most other vendors use on or another model of Phison controllers.