Why did the Portuguese take out slaves from their African colonies while the Spaniards brought them into their American colonies?

There were enough conquistadors in Spain, they needed slaves to work on the plantations. The Portuguese did not have enough entrepreneurs to create plantations, so they limited themselves to collecting tribute, exchange trade and small wars in order to capture slaves.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.