Size limitation on char Array on ESP8266

I’m creating a log of events, stored as a txt file. If it matters, I’m using ESP8266.

To display the log of each IOT, I’m publishing the txt file to a disgnated MQTT topic for all my IOT devices (later on to Telegram ). For sorting ( new first and old last ) I read each line into char array, post it to MQTT, and save it back to txt file.

Currently char array is defined as: char log_array[20][200] – meaning I’m keeping a log of 20 records, of 200 chars long.

Is it the right way ( declare a char array ) ? are there any limitation for size of array ( say 200 records )

Guy