Transfer onenote notebooks from a deleted account to a new account

Hi,

I am a bit stumped with this. I have a number of extensive onenote notebooks that I used to keep on my work onedrive. I changed jobs and they have deleted my old work onedrive. I can still access the notebooks on my own computer, but can't find the actual notebook files on there.

I would like to transfer these notebooks to my new onedrive. But I can't find the files on my hard drive and I can't connect to the old onedrive anymore so I can't do the online export/import suggestion that I read somewhere else.

Any help would be greatly appreciated.