The consignment was found in a container on the outskirts of Letterkenny just before Christmas.
The man, who has an address in Letterkenny, is understood to be a foreign national living locally for a number of years.
We understand the man had been under surveillance for some time by customs officers.
The raid was part of a national operation with several raids taking place in other locations across the country.
Gardai assisted customs officers as part of the operation.
A file on the matter has been sent to the Director of Public Prosecutions for consideration.