King David’s kingdom was marked by extraordinary power and greatness, reflected clearly in his highly organized administrative systems. To ensure strict protection and careful management of the nation's wealth, specific officials were appointed over every conceivable area and asset, with the detailed records reaching even the caretakers of the royal donkeys. The attention here centers on the ministers responsible for the economy and the treasuries, carefully distinguishing between the wealth kept inside the royal palace and the assets stored outside of it [רש״י, רלב״ג, רד״ק].
Azmaveth son of Adiel was appointed over the internal royal treasuries. The commentators agree that these specific treasuries were located within the king's palace and primarily held financial capital, such as silver and gold. In contrast, Jonathan son of Uzziah was tasked with managing the storehouses located out in the fields, cities, villages, and towers. Spread throughout the kingdom, these external facilities were designed to hold the nation's agricultural bounty, including grain, fruit, wine, oil, and various other foods and beverages [רש״י, רלב״ג, מלבי״ם].
Beyond simply holding food supplies, these scattered storehouses and towers served a crucial military purpose. They were used to store the weapons necessary to arm the population and defend the king's cities [רש״י, מצודת דוד]. As an interesting structural detail, the specific mention of the king's internal treasuries marks the exact midpoint of the Book of Chronicles by verse count [מנחת שי].