Flash Memory in ESP8266:
SPIFlash is a type of Flash memory used in ESP8266 microcontrollers to store program code, data, and configuration information. It comes in various types and sizes to accommodate different needs. The most common SPIFlash options include Winbond, GigaDevice, and ISSI.
The available sizes for SPIFlash in ESP8266 typically range from 512KB to 16MB. This variety allows developers to choose the right storage capacity for their specific applications. Some ESP8266 variants also support external SPIFlash for expanded storage.
PSRAM in ESP8266 :
ESP8266 doesn’t support PSRAM