leandrohat:
a variable "int" will be storage in SRAM memory. right?
Correct
a "const int" will be storage in SRAM memory or in flash memory?
SRAM
how can i do for storage an array in a FLASH memory? only with PROGMEM?
Correct, and you will need to use specific commands to read them back in your sketch from flash.
my array is char img(5000);