SD card reader speed in M3 pro macbook pro 2023

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

Posted on Jun 3, 2024 6:04 AM

Reply
2 replies

Jun 3, 2024 2:34 PM in response to pearshaped2030

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.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

SD card reader speed in M3 pro macbook pro 2023

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.