A big problem when mining is clutter, when on a mining expedition with a carrier, the carrier will set its market to buy certain items, so you don't want to be picking up anything that is not on that list.

say the carrier is buying platinum, when you go into the hotspot prospect an asteroid, look at what is in it, leave your cargo hold closed, mine some of the asteroid, go to your contacts panel, you will see a list of materials ready to be picked up by the drones, click on one of the items, (often it will contain 2 resources) an option will come up to add to ignore list, do this for all items but platinum,(you can remove by same method later if required).

keep track of different asteroids until you have all but platinum on ignore list, (any ring will have a dozen or so items that you don't want, depending on the type of ring)

this avoids clutter and reduces the instances of the hoppers getting jammed up with excess during mining,

have fun, 07