Storage Upgrade 1 gives the Slime Drone 5 inventory slots.

*Hoppers can suck items out of Slime Drone's inventories if a Drone was to stand on a hopper*

Storage Upgrade 2 gives the Slime Drone 27 inventory slots.

*WARNING* If downsizing to storage 1, make sure inventory is clear or you may lose any items left within the drone.

Hopper Upgrade allows the drone to pick items up into it's inventory. The Drone will not actively try to pick up items, they will only take in items they step on.

*Requires a storage upgrade*

Farmer Upgrade allows a Slime Drone to farm for you!
The Drone will place seeds onto farmland (Place seeds in inventory), and will harvest any crops that are ready. Drones will also fertilize crops if also given bonemeal.

*Requires a Storage Upgrade + Hopper Upgrade*