Source: Greece. Greek reporter
Among others, a special AMNA report on drug trafficking in Southern Europe labels Albania is a “collection point” for heroin, which is then transported by Albanian organized crime to various destinations, including Greece. There is a significant involvement of Greek citizens, in “cutting” and packaging heroin ready for sale.
Greeks have a limited role in the cocaine trade. Western Europe such as Spain and Italy control the cocaine trade routes. Albania's involvement in cocaine trafficking has increased systematically. Albania serves as cocaine distribution point outreaching the European markets. The report mentions that Albania is a storage country, along with the heroin trafficking. At this point, Greeks still dominate their own cocaine dealing market.
Most cannabis sold in Europe comes from Albania, either through Greece and Italy or via northern borders.