NodeMCU V3 + SD Card with Arduino IDE Not working
If you are giving power to nodemcu through USB cable. SD card VCC can be connected to the VIN pin of nodemcu ESP8266. I faced the same problem
NodeMCU V3 + SD Card with Arduino IDE Not working
but after connecting VCC of SD Card to VIN pin of nodemcu. it worked.
Thanks for the helping me Mr. Juraj