Your AI knows the world. It does not know your world.
A knowledge base you own, in a folder you control, that Claude, ChatGPT or Gemini can read. No Obsidian, no code, ten minutes to something useful.
Free. No email required, nothing to download.
Your AI already knows a lot about the world. What it does not know is your world.
Your goals. Your projects. Your clients. Your audience. How you write. What you decided last March and why. The research you have already done and forgotten.
An AI second brain is just somewhere it can go and find that. Google Drive is the memory. Claude, ChatGPT or Gemini is the interface.
This is not the same as the AI remembering you. Every one of these tools has built-in memory, and that memory belongs to the tool. You cannot see all of it, you cannot organise it, and it does not come with you when you switch. A knowledge base in a folder you own does.
There is a full structure in the next section. Do not build it yet.
The way these systems die is that someone spends an hour creating a beautiful empty filing system, fills two folders, and never opens it again. Build the smallest version that can be useful today.
Create a folder called MY AI BRAIN and put four folders inside it.
The numbers look odd with gaps in them. Leave them. When you add the rest of the structure later, everything slots into place without renaming anything.
Once the four folders have real files in them and you have used the system a few times, this is where it grows to. Add folders when you have something to put in them, not before.
Before you add the LIFE folder, or anything personal: only put in things you are comfortable giving a connected AI access to. No passwords, no recovery codes, no identity documents, no financial account details. These connectors can do more than read. Claude’s can create folders, move files and put things in the trash. That is useful, and it is also a reason to read what an AI proposes to do before you approve it.
The folders are not sacred. Rename them. Someone in sales wants a CUSTOMERS folder. Someone job hunting wants CAREER. Someone studying wants a subject per folder.
The structure only has to make sense to two readers: you, and the AI reading your START HERE document. If it makes sense to both, it is right.
This is where most people stall. They make the folders, open a blank Google Doc called About Me, and stare at it.
Do not write these from scratch. Get them interviewed out of you.
Help me create the core context documents for my AI second brain. Ask me simple questions, one at a time, about who I am, what I do, my goals, my current priorities, how I prefer to work, and anything an AI assistant should understand about me. Once you have enough, create separate drafts for: About Me, My Goals, How I Work, My Preferences, and Current Priorities. Keep them practical and concise. No filler.
Save each one into 01 - ME & CONTEXT. Add the date you wrote it at the top of each document.
That date matters more than it looks. Your START HERE document tells the AI to prefer recent information when files disagree, and it can only do that if things are dated.
This is the one document that makes the rest of it work. It tells your AI what the system is, where things live, and how you want it to behave.
Copy it, adjust the folder list to match yours, and save it into 00 - START HERE.
MY AI BRAIN Last updated: [DATE] PURPOSE This Google Drive folder is my personal knowledge base. Use the information in it when it is relevant to what I have asked you to do. Do not assume things about me that could be checked in these files. FOLDER MAP 01 - ME & CONTEXT Who I am, my goals, preferences, priorities and how I work. 02 - WORK Work information, processes, templates, clients and examples. 03 - PROJECTS Things I am actively working on. 04 - KNOWLEDGE Research, notes and useful information I have collected. 05 - CONTENT & BRAND My audience, brand voice, content, offers and creative ideas. 06 - LIFE Optional personal information and projects. 07 - INBOX New information that has not been organised yet. 99 - ARCHIVE Old or completed information. HOW TO USE THIS 1. Search the folders most relevant to what I have asked. 2. Prefer what is in my files over assumptions about me. 3. Where files disagree, use the most recently updated one and tell me there was a conflict. 4. Tell me if something important looks missing. 5. Tell me which files you used. 6. Do not invent context that is not there. If you do not find it, say so.
Update the date at the top whenever you change the map. It is the only thing telling the AI how much to trust it.
The knowledge base is the durable part. Connectors change every few months, so treat this as the version that was true when this guide was written and check the current setup if something looks different.
Drive is the knowledge base. The Project is the control room. Do not dump the whole Drive into the Project. The point of the Project is that the handful of documents you always need are always loaded.
A knowledge base you never ask anything is a folder. These twelve questions are what turn it into a brain. Copy them, swap the bracketed parts, and adjust the folder names to match yours.
Before helping me with this task, search my AI Brain for anything relevant about me, my work, my preferences, previous decisions or related projects. Briefly tell me what context you found, then use it when completing the task.
Search my Projects, Current Priorities and Goals. Based only on what you find there, identify the three highest priority things I should focus on this week. Explain why each matters and flag anything important that appears stalled.
Review everything related to [PROJECT]. Give me a concise briefing covering the goal, current status, important decisions, unfinished work, and the next three actions.
If you only use one, use the first. Asking for context before the task, rather than explaining yourself again, is the whole point of the system. It also tells you immediately whether the brain has anything useful in it yet.
Search my Knowledge folder for everything I have saved about [TOPIC]. Give me the main ideas, where sources agree, where they conflict, and the most useful things for me to remember.
Search my Projects and Knowledge folders for times I have faced a decision like this one. What did I decide, what happened afterwards, and what would I tell myself now?
Look across my Knowledge, Projects and Content folders for unexpected connections between ideas I have saved. Give me five useful connections and explain why each could matter.
Review my Brand Voice, Audience and Writing Examples. Then create [OUTPUT]. Match the patterns in my existing work rather than using generic AI writing.
Search my Content & Brand and Inbox folders for ideas I have saved but never developed. Find the five strongest opportunities based on my current goals.
Using my Work and Projects folders, write a handover brief for someone taking over [PROJECT]. Assume they know nothing about my business. Flag anything only I currently know.
Compare my current Projects, Goals and Priorities. Tell me what has moved forward, what is stalled, what no longer looks important, and what I should prioritise next.
Review everything in my Inbox folder. For each item, recommend where it belongs, whether it relates to an existing document or project, and whether anything looks duplicated or no longer useful. Ask me before making any destructive changes.
Review my recent Projects and work against my About Me, Goals, Priorities and How I Work documents. Suggest any updates that would make my core context more accurate. Do not change anything until I approve it.
No daily journalling. No tagging system. No spending Saturday reorganising folders. Three habits, and the first one is barely a habit at all.
Useful information comes in. The AI helps you make sense of it. The good stuff stays available. That is the entire loop.
You do not need to document everything. Most of what crosses your desk is not worth keeping, and a brain full of noise is worse than a small one full of signal.
Optional, and only worth doing once the system has been running for a few weeks.
Claude Cowork can run scheduled tasks that use your connectors, which means the weekly review can happen without you remembering to do it. Scheduled tasks are on paid plans. If you are on the free plan, run the same prompt yourself on a Friday.
Every Friday, review my AI Brain. Check my Inbox, current Projects and Current Priorities. Identify: files that need organising, projects that appear stalled, information that looks out of date, important things I have saved but not acted on, and suggested priorities for next week. Do not delete or move anything without asking me first.
That last line is not optional. An agent with file access and no approval step is a bad Friday waiting to happen.
This is the complaint. It is almost always one of four things, in this order.
If all four check out and it still misses things, your START HERE document is doing too little. Make the folder descriptions in it more specific about what each folder contains.
Everything on this list is genuinely ten minutes. Do it before you close this page.
Anywhere in your Drive. The name matters, because you will use it in prompts.
00 START HERE, 01 ME & CONTEXT, 03 PROJECTS, 07 INBOX.
Into a document, dated, saved in 00 START HERE.
Things you already have. Do not write anything new yet.
Claude, ChatGPT or Gemini. Whichever you already pay for.
This is the test. If it answers, the system works.
Then, when you have twenty more minutes:
That last one matters. The first time you use the Inbox properly is the moment this stops being a system you are building and starts being one you are using.
Every AI company wants to be the place your context lives, because context is what makes you stay. Keeping it in a folder you own is a small act of independence that costs you nothing.
The tools will change. Connectors will get renamed. A better model will come out in six months and you will want to try it. When that happens you will point it at the same folder and carry on, instead of starting again.
We build custom content systems for founder-led businesses. Book a call and we will tell you straight whether it is a fit.