Hello,
English is not my native language, so do not pay attention if suddenly I do not quite correctly express my thoughts or emotions.
I’ll ask right away what is “WRT target configuration” or where to read about it?
I would agree about the SD card, but the post confused me:
I would be glad to see similar messages, especially since I see them in the bootloader *.bin file:
“Mbed Bootloader
booting …
Failed to jump to application!
@ t [DBG] Active firmware slot is empty
[DBG] Failed to boot active application
[DBG] Active firmware integrity check failed
[DBG] Update active firmware
Update image too large
Update image integrity check failed
Update image is older
No Update image
[DBG] New active firmware is valid
[DBG] Firmware update failed
[DBG] Active firmware up-to-date
[ERR] Active firmware invalid”
But I only see “Mbed Bootloader” in the serial port monitor window … 
I added these lines for SPI2, I think which pins and which interface to use is not important? I checked the work with esp8266 over two wires on a separate example, everything works fine.
{
…
“sd.SPI_MOSI”: “PB_15”,
“sd.SPI_MISO”: “PB_14”,
“sd.SPI_CLK”: “PB_13”,
“sd.SPI_CS”: “PB_12”,
“esp8266.tx”: “PA_9”,
“esp8266.rx”: “PA_10”,
“esp8266.provide-default”: true
},
I connected such a module and an 8 GB SD card, I could not find less: Adding ethernet connectivity to a STM32-Nucleo /
it looks like some kind of hardware problem
The module itself is functional, the example on this link works with the network.
And I remember that the signals for select SPI for SD and Ethernet are different on different pins.
I haven’t been able to get the map to work yet using this example:
if compiled with
#include “HeapBlockDevice.h”
BlockDevice * bd = new HeapBlockDevice (4096, 1, 1, 512);
then the example works fine on the heap.
I’ll try to figure out where the problem is with the SD card, but it will be very disappointing if the problem is not in its absence … 
I read the firmware with the programmer and I see three blocks there at the addresses that are specified in the configuration file.
To be honest, I have no idea what I’m doing wrong.
Maybe try to buy NUCLEO-F737ZI with Internal Flash, but it’s not very fast.
Perhaps the matter is in Build-only and the example is not working?
ST NUCLEO_F411RE Wi-Fi ESP8266 SD card Build-only