Read txt file line by line with SPIFFS

i’m working on SPIFFS on my ESP32 and i need to extract data from it and affecte every line to a String variable
anny help
and thanks

SPIFFS is deprecated now, so you ought to be using LittleFS instead.

However, this isn’t a Blynk related question. There are lots of SPIFFS/LittleFS examples on the internet, just do a quick search.