"It is everything. If you come to my house what she has done, because she was taking them to the funeral, so she has taken all the photos down from our walls and everything she owns in that regard. There is nothing in the suitcase that is valuable to anyone," Mr Harrison said. "It is 100 per cent sentimental, [apart from] one camera in there that I don't care about."
Following the discovery, Mr Harrison said he informed police before rushing his partner and son to the airport for their flight.
En-route he said he noticed a work vest which had been discarded on the side of the road out of his car window.
"I pulled over to the side of the road and I picked it up and I read on the back and it said my previous company that I used to work for and I was like oh... [the bag] must be around here, they must have just tossed it and we looked around and all I found unfortunately was the work vest."
Mr Harrison, who has remained in New Zealand, has taken to social media in a desperate search for information on the whereabouts of the bag.
"I would pay to get that back because it would be one less thing for her to worry about," he said.
He planned to spend today driving around Hunua and Papakura in the hopes of finding the suitcase dumped on the roadside.