More memory to save data

Other Hardware Storage
7

Looks like I cannot store data in Flash memory in runtime.
I am trying to save the sensor data for 10sec at some location. But no been able to find a solution.

problems:

  1. I have about 80kb of data to save. I cannot use flash memory as I cannot save runtime data in flash.
    2)I cannot use RAM, less space
  2. I cannot use eeprom, less space.

So can you guys please suggest anything else?