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What is Obsidian? — Obsidian + IA locale : Second cerveau privé

Module 1: Why Obsidian + AI? — Understand the privacy and ownership advantages of building a local AI-powered second brain.

What is the core philosophy behind Obsidian?
Your notes are stored as plain text markdown files on your local hard drive, giving you complete ownership. — It focuses on local-first data ownership.
True or False: If Obsidian the company shuts down tomorrow, you lose access to all your notes.
False — Because the files are stored locally on your machine, they belong to you forever.
Unlike Notion or Google Docs, where does Obsidian store your data by default?
Locally on your own device's file system. — There is no 'cloud' involved by default.