i am currently working with external flash memory(STM32G070) . I have of Data log store to external memory If GSM off that time data store sequentially in Flash memory when GSM is on that time that time read that log send to server. using SPI i wrote data and read that data. Difficult is when that memory is overflow and another problem is If i reading data (GSM ON ) condition but suddenly GSM goes OFF that time I want to write data log sequentially when i lastly read that address i want to write data log .Hope u get my question. refer any techniques about external memory or file system
