How do I find out the speed of the SD card reader in my Macbook pro M3 pro? The micro SD card I'm using is a UHS 1 with minimum write/read speed of 30MB's but when I move files to and from the micro SD card to and from the desktop it averages a speed of 10MB's. Checked under Hardware/Internal Memory Card Reader but no speed is quoted in there. Thanks
MacBook Pro 14″, macOS 14.5
I found this Wired article that describes speeds for SD cards:
https://www.wired.com/story/sd-card-speeds-explained/
According to Wired, the minimum speed for a UHS U1 card is 10 MB/s, while the U3 cards are rated at 30MB/s. But that's the *rated* minimum speed, meaning that class of card is at least capable of moving data that fast, while they usually can go quite a bit faster. The actual speed of transfer depends on the device, software, files, etc. I didn't see anywhere that Apple indicates how fast their card slots are, neither in Support, Disk Utility, nor System Report. Might be information on the web somewhere.
Abovdal thanks for your input!
Under System Report/Hardware/Card Reader I did find "Link Speed 5GT/s" but I'm not sure that's totally relevant to the write/read speed of the reader and I could not find in the web the 5GT/s equivalent in MB/s or Mb/s or anything else meaningful to me! Any ideas anyone?
Thanks
SD card reader speed in M3 pro macbook pro 2023
