Can we read and write flash memory by specifying an address?

[natee.th]

Can we read and write flash memory by specifying an address?

I understand specifying the partition location and we have free space (spiffs). If I want to read data from flash memory byte by byte, what command should I use or how do I do it? Maybe 8, 16, or 32 bits per address. I don't want to read it as a file.

[MicroController]

esp_partition_read(...)/esp_partition_write(...)