How can I export/import one users folders to another users inbox in Outlook

I have a user who left our company, the user taking over position needs to have those folders under her inbox, I tried export/import and it worked for 1 folder and then trying another folder it said the file could not be found. Other than exporting/importing these folders (there is about 20-30 folders) is there a faster way to do this?

Any suggestions are appreciated, Thank you