My Clippings.txt is the file every Kindle device maintains internally, a plain-text log of every highlight, note, and bookmark you've made across all your books. Plug your Kindle into a computer via USB and it appears in /documents/My Clippings.txt. The format is line-based with == separators; great for archiving your reading history into Notion, Obsidian, Readwise, or any markdown system.
How to open
Plain text, open in any text editor. The file is machine-readable, which is why people convert it into structured formats (CSV, Markdown, Notion-compatible CSV) for import into knowledge-management tools.