Crash Site

Wreckage can be found all across the World. Scattered around the wreckage will be various components such as wires or computers. There will also be a Drop pod that (usually) needs to be repaired in order to access the Hard Drive inside it. Wreckage is generally either located at hard-to-access area, or guarded by large creatures. Some of the wreckage may be located inside poison gas.

How To Get The Hard Drive
First the drop-pod needs to be repaired. Open the drop-pod's UI to find out what specific items need to be present in the Engineer's Inventory. Additionally the drop-pod may requires Power to be repaired. Build temporary Biomass Burners or Coal Generators to supply it with temporary power, or connect it to a power grid. The supplied power must not be less than the required power else there will be a power trip.

When the requirements are fulfilled the handle on the drop-pod UI can be dragged down, opening a hatch and allowing the Engineer to retrieve the Hard Drive.

Location
There are several fan-made in-game maps listing drop pod locations. Once the Object Scanner is obtained and equipped at Tier 0: Hub Upgrade 5, you could right-click it, set to Crash Sites to search for drop pods. The object scanner will point to the nearest drop pod regardless if the Hard Drive inside it has been retrieved.

Rewards

 * Hard Drive