Fast Data Logging of 250Hz analog signal to SDcard via Arduino Uno + Arduino WiFiShield -

Fast Data Logging of 250Hz analog signal to SDcard via Arduino Uno + Arduino WiFiShield -

i have store sampled info of low frequency sinewave of 250hz sdcard via arduino wifi shield. note relatively new arduino world.

detailed requirement specs:

1) sampling frequency = ~8khz (rate of adc samples data)

2) byte size of single sample = 10 bits adc = 1.25bytes

3) sdcard = micro sandisk card 32gb.

i did lot of research on , know sdcard writing latency ~250ms sdhc. don't think able comprehend advance technique such changing kernel. need sample 250hz or less analog wave , stored in sd card. also, can arduino adc's sampling rate reduced below 8khz?

any help awesome.

thank you.

android-sdcard arduino-uno data-acquisition