microSD-Card question

[bit-bashing]

Lup, thanks for, as always, providing some excellent technical content. I bought several of the Ox64's when they first appeared and had lots of problems with the SD not being recognized due to a timeout issue (link: openbouffalo/buildroot_bouffalo#16). As a result, I haven't used them since. What is the SanDisk microSD card you used and do you know what the timeout issue is caused by and if it will ever be resolved?

[lupyuen]

Update: If I power up Ox64 with 3V3 from the USB Serial Adapter (instead of Micro USB), I see microSD Timeout Errors sometimes. So it's good to check that Micro USB is providing sufficient power to Ox64.

Thank you so much! :-) I'm using this microSD to overwrite and boot NuttX Kernel over 20 times, no problems so far: (I chose High Endurance instead of High Performance because I'll be rewriting often)

SanDisk High Endurance 64GB microSDXC
Rated Class 10, U3 and V30
Item Model Number: ‎SDSQQNR-064G-GN6IA
Link to Amazon

I'm not sure about the Timeout Issue, but it's probably not caused by Ox64 Hardware? The same microSD worked OK on 2 models of Ox64:

• Pre-Production Ox64 (17 Sep 2022)
• Latest Batch of Ox64 (18 Oct 2022)

Some years ago I had data corruption issues with "Imitation" SanDisk microSDs. I hope you're not having the same problem?

Here's what I'm using now: