Zero acceleration only happens after an object has been falling for a long time (more then a few seconds) and the friction is in balance with gravity. Zero acceleration also happens when the laptop is just sitting on a table. Probably wouldn't be a good measure to stop the drive.
Initially, an object falling will accelerate with g=9.81m/s^2, after it reaches the ground it will de-accelerate to a speed of 0m/s in a couple of ms. You are confusing weightlessness/zero-g with no acceleration.
