I was looking up how to read and write to the SD card on the V5 brain, I found @jpearman ’s code SD Card Help - #3 by jpearman however, it continually told me that it had an “Error writing to the SD card”, this in this code, seems to mean it did not successfully write to it. I tried formatting it to…

Unofficial Response Hello @PokePanda , Please make sure you select the correct category. I believe potentially VEX V5 Technical Support or VEXcode V5 Tech Support would be a better tag as your question is not related to #programming-support:vexcode-vr-support . Anyways, I feel as though the like…

Here is my code: /*----------------------------------------------------------------------------*/ /* */ /* Module: main.cpp */ /* Author: {author} …

Code is fine (although you don’t need the line vex::brain::sdcard; ) so either bad SD card (or formatting, write protect issue etc.) or hardware fault with the V5. What make and size is the SD Card ?

Ya sorry the sd card line was trying to fix it, it is a 64 gigabyte, PNY Elite - X

Try replacing int nWritten = Brain.SDcard.savefile( "test.h", myTestData, sizeof(myTestData) ); with int nWritten = Brain.SDcard.savefile( "test.h", (uint8_t*)"test", strlen("test") ); and see if that works. That way you can tell for sure if it’s the SD card.

Unofficial Response [image] PokePanda: Ya sorry the sd card line was trying to fix it, it is a 64 gigabyte, PNY Elite - X I believe this quote from April, 2019 may be relevant: [image] What SD cards are supported for the V5 Brain? We set the spec at 16GB because, to be honest, we didn’t …

I’ve used 128GB and its worked fine.

I believe it might not have formatted correctly so I am going to try again to get it to fat32.

[image] Skyluker4: I’ve used 128GB and its worked fine. I said the same thing in the thread I quoted. @jpearman said that some SD cards just don’t want to work with the V5 brain. But he didn’t say that SD cards above 16 GB will not work.

Thanks again, it turned out that the formatting was wrong, thanks again @jpearman for the SD card code, works great.

SD Card Error Writing

Programming Support VEXcode V5 Tech Support

anon4126930 June 13, 2021, 8:41pm 7

Unofficial Response

I believe this quote from April, 2019 may be relevant: