The beginnings of Trans-Atlantic Slave Trade in New York started with the Dutch West India Company which held the distinction of having a monopoly in supplying African slaves to the New World. In 1626 the Company brought eleven slaves to its colonial City of New Amsterdam on the island of Manhattan. In 1654, the first slaves were brought to Suffolk County (Shelter Island). In 1664, the British took over the former Dutch colony of New Amsterdam and changed the name to New York. New York held the largest population of slaves than all of the New England colonies combined.
Slave practices in New York State did not mirror the use of slaves on plantations in the South. The number of slaves per household was relatively low as compared to the South, mostly due to the nature of New York’s climate, geology, and geography. Slaves in New York worked as domestic servants, supplemental family farm labor, certain trades persons (tailors, blacksmiths, low-status occupations, etc.) and for whaling. Slavery was gradually abolished through State legislation over the course of time from 1799 (Gradual Emancipation Act) through 1841 (Act to repeal remaining exceptions to abolition).
References:
https://en.wikipedia.org/wiki/History_of_slavery_in_New_York_(state)
https://www.encyclopedia.com/history/modern-europe/benelux-history/dutch-west-india-company
https://www.wshu.org/news/2020-07-08/slavery-on-long-island-the-history-that-we-forget-to-rememberhttps://longislandmuseum.org/exhibition/long-road-to-freedom/