# The agent's Memory (knowledge documents)

> Upload PDF, DOCX, TXT, MD or CSV documents of up to 10 MB so your AI agent answers with your real estate agency's actual information.

Source: https://docs.watsi.ai/en/agent/knowledge

**🧠 Memory** holds the documents your agent reads to answer: price lists, development fact sheets, financing requirements, reservation policies. You upload **PDF, DOCX, TXT, MD or CSV files up to 10 MB**, watsi processes them and the agent searches them for the answer to each question. The agent never sends these files to the customer; that is what [Resources](/agent/resources) are for.

## Upload documents

### Open "🧠 Memory"
### Click "Add files"
    Your computer's file picker opens; you can choose several at once.
### Wait until they are "Ready"
    Each file uploads right away and shows its status: "Processing...", "Ready" or "Processing
    failed".

> **Note**
  Memory files upload as soon as you choose them: you don't need to save a version for the agent to
  use them.

If a file stays at "Processing failed", use "Re-upload file". You can also open it ("Open file") or delete it ("Delete file").

## Limits

| Item              | Limit                   |
| ----------------- | ----------------------- |
| Formats           | PDF, DOCX, TXT, MD, CSV |
| Size per file     | 10 MB                   |
| Text per document | 100,000 characters      |

## Tips

- **One topic per document.** One PDF per development or per policy works better than a single file with everything.
- **Keep prices current.** If a document has old prices, the agent may quote them; delete it and upload the new one.
- **For questions that keep coming up,** add a [Q&A](/agent/qa): the exact answer you want it to give.
- **For prices and availability,** use [Products or Properties](/agent/products) instead of a PDF.

## Related

- [Resources](/agent/resources)
    Files the agent sends to the customer.
- [Playground](/agent/playground)
    Check which sources the agent used in each reply.

## FAQ

### Which files can I upload to the agent's Memory?

PDF, DOCX, TXT, MD and CSV, up to 10 MB each.

### How long until the agent uses a new document?

Each file uploads as soon as you choose it and shows "Processing...". Once it changes to "Ready", the agent can use it.

### What is the difference between Memory and Resources?

Memory is what the agent reads to answer; it never sends those files to the customer. Resources are files the agent does send to the customer in the chat.