To send a drive box hold the box in your hand and then do Left Shift + Mouse 1 onto the bag under the drone to put it in. I think that works for putting a held item into any inventory. Unfortunately this doesn't work for the Item Box to sell things... Since you can't hold it, unsure how to get an Item Box to sell at this time :(
Viewing post in Sending drives 0.9
I guess that makes sense yeah, I did think about doing that. The problem is I like to carry the box around with me and fill it up with trash in the base, and then send it all away in one easy go. A little more time consuming if I have to transfer everything from the box to the bag, or run back and forth to the bag, but I suppose I can work with it.