How to inform the user which folder needs to be selected in a Folder Dialog?

I'm working on a program that can import data that's exported from another program. I'm using a simple input field with a browse button to open a "Folder Dialog" like this

Import path field

The browse button opens a default Windows Folder dialog:

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Now, the exported data is put in an architecture of folders and the user needs to select a specific folder named "Export_XXXXXX", where the X's are a specific date + ID number.

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What is a good way to inform the user that he needs to select this "Export_xxxxx" folder?

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