Here is more info on the encoding: http://www.dspguide.com/ch27/4.htm Tom Meyers Thank you @tommeyer; your point as storing values in 16bit format, clear now. I have a specific file format mixed with text and HEX and need a conversion to implement that, worth to deal with to double the amount :) By...

Thanks for the answers. @ESP_Sprite, Actually best practice would be to write raw data directly ın SDCard but write speed does not allow sampling over 1kHz. I guess wrover with 4MB SRAM will fit my need for this specific purpose but I have package constraint unfortunately. Isn't there a possibility ...

Hello, I'm trying to build an ESP32 (ESP32-WROOM-32D 4MB) device to collect at least 30 seconds of analog sensor data (i.e. accelerometer) by 20.000 Hz and store the data in array later in an SD card. Since each stored the data is Float32; the data will take 30 x 20000 x 4 = 2.400.000 bytes in memor...