1) When checking asteroids to identify their contents, it can be difficult to deal with the rubble that's created if you're out of range of the resource bridge. Having one ore slot in your backpack would let you vacuum up the rubble and get through to the core without having to spam rock chunks everywhere (and hurt your framerate as you generate them).
2) For new and experience players alike it can be difficult to identify ore at a glance, and it can be tricky, and slow, to always make sure your ship is in range for a quick check on an asteroid. Having one slot would let you pick up and identify a sample of the ore without having to bring it back to resource bridge range. This would also be helpful for colorblind players, who I have to imagine would struggle to identify ore quickly.
2) For new and experience players alike it can be difficult to identify ore at a glance, and it can be tricky, and slow, to always make sure your ship is in range for a quick check on an asteroid. Having one slot would let you pick up and identify a sample of the ore without having to bring it back to resource bridge range. This would also be helpful for colorblind players, who I have to imagine would struggle to identify ore quickly.