![](/static/253f0d9b/assets/icons/icon-96x96.png)
![](https://lemmy.ml/pictrs/image/d3d059e3-fa3d-45af-ac93-ac894beba378.png)
Untill someone makes a wood detector I don’t think they are worried about it.
The point is that a metal detector is specifically made to find stuff easier, and significantly cuts down on manpower needed to find stuff, increasing the risk of scavanging.
No, the data is not physical, it is either magnetic or electric.
Since most people still store their media on hard drives most media is purely magnetic.
In a solid state drive storage chip the data is stored electronicly.