I would like to thank Mr. @peterfun for completing the topic of reading recorded data from a micro SD card: peterfun/sd-card — XOD
Since this topic will still raise questions, I decided to share the method of working with an already read STRING. You can easily select the desired element from it using nodes from the library: gabbapeople/uart-led-control — XOD
There are nodes for decomposing a tabular string, for example, purse-number, purse-tabular. Based on them, I created an example of writing bytes as numbers to an SD card. Next, I read the byte I need. I use " , " as a tab character. I hope this technique will be useful to someone.
test-sd-card-write-and-read.xodball (24.9 KB)