In the Odyssey, who controlled the store room and why?

Answer 1

Odysseus controlled it. It held a weapons and shields.

Excerpt:
With this, Melanthius climbed the steps to Odysseus’ storeroom, and came away with a dozen shields and spears, and as many bronze helmets with thick horsehair plumes and carrying them quickly brought them to the Suitors. Seeing them donning the armour and brandishing long spears in their hands, Odysseus’ heart trembled and his knees shook, and the task ahead seemed huge.

Another excerpt summarizing the Odyssey:
Goatherd Melanthius, who twice assaulted Odysseus in recent days, manages to bring the suitors armor and spears from the storeroom but is caught by Eumaeus and Philoetius on a second attempt and strung up, alive, to be dealt with later. With Athena’s intervention and encouragement, Odysseus wins the day. All suitors are killed. The king then dispenses justice to a few remaining individuals and a dozen servant girls.

Answer 2

After identifying himself to the Phaeacians at the feast, Odysseus tells the story of his wanderings. Following the victory at Troy, he and his men sail to Ismarus, the stronghold of the Cicones. With apparent ease, they sack the city, kill the men, enslave the women, and enjoy a rich haul of plunder. Odysseus advises his men to leave immediately with their riches, but they ignore his warnings. The Cicones gather reinforcements, counterattack, and eventually rout the Greeks. Odysseus and his men retreat by sea. Storms blow the ships off course, but they finally arrive at the land of the Lotus-eaters. The inhabitants are not hostile; however, eating the lotus plant causes Odysseus’ men to lose memory and all desire to return home. Odysseus barely gets them back to sea. The next stop is the land of the Cyclops, lawless one-eyed giants. One of them, Polyphemus, traps Odysseus and a scouting party in his cave. Only the Greek hero’s wily plan allows escape.