Workflow to ingest files from Zoom audio recorder
If youre hopefully running windows, use explorer (My Computer). Navigate to the SD card. In the search box for that window, type *.wav (or whatever extension you used to record). 

The window will then display all the WAV files found on the card, without the folder. Select all of them. Copy. Paste to a new folder. 

If you encounter conflicts in terms of clip name, use the 3rd command called "Allow Windows to Resolve", which will create v2 v3 v4 of the files which use the same file name.