Here is a quick description of how I process my highlights and notes from my Kindle books.

• in Kindle: Show Notebook > Export > Save As > xxx-Notebook.htm
• in Condensr: Advanced > Dropping > Parsing dropped HTML
• Select and Drag and Drop the HTML content
• Export > Items to CSV text file
• in Excel, swap the two columns
• in a new Condensr map, paste the changed CSV
• Done

For annotations from Zotero and Hypothes.is, I made descriptions before:

• https://www.youtube.com/watch?v=PtUeBnDk_is
• http://condensr.de/2019/03/01/new-import-format-annotations/

respectively.