> ## Documentation Index > Fetch the complete documentation index at: https://knowledge.bitbybit.studio/llms.txt > Use this file to discover all available pages before exploring further. # Send files in chat with AI attachments > Upload files to AI attachments in AI Studio and mention them in your AI agent's instructions so it sends them to customers in chat. **AI attachments** is where you store files your AI agent can send to customers in a chat, such as a menu, price list, or catalog. You upload a file once, then mention it in your AI agent's instructions to say when to send it. Files in AI attachments are sent to customers as-is. If you want the AI agent to read a file and answer questions from it, add it to the [AI knowledge base](/ai-studio/how-to-add-your-data-to-ai-knowledge-base) instead. ## Step 1: Upload a file * Go to **AI Studio** > **AI attachments**. * In **Upload file**, drag your file into the box or click to choose it. Supported file types are pdf, doc, docx, xls, xlsx, csv, ppt, pptx, txt, jpeg, and png, up to 10MB each. If you upload a file with the same name as an existing one, the new file gets a number added, for example "menu (2).pdf". AI attachments page in AI Studio showing the Upload file box and the file list with an uploaded PDF ## Step 2: Mention the file in your AI agent's instructions * Open your AI agent in **AI Studio**. * In the **Instructions** field, type **@** and choose the file from the **Files** group. * Say when the AI agent should send it. For example: "If the customer asks for the menu, send @menu.pdf". AI agent Instructions field with a line that mentions an uploaded file using @ ## Step 3: Test it * Open the [Playground](/ai-studio/test-your-ai-agent-in-playground) and ask the question from your instruction. * Check that the AI agent sends the right file. ## Manage your files The file list shows each file's name, size, and upload date. Use **Search file** to find a file, and the actions to open or delete it. When you delete a file, your AI agent can no longer send it, and any instruction that mentions it stops working. Update those instructions after you delete a file. ## Related articles * [Set up your AI agent in AI Studio](/ai-studio/how-to-setup-ai-agent-in-ai-studio) * [How to add your data to AI knowledge base](/ai-studio/how-to-add-your-data-to-ai-knowledge-base) * [Test your AI agent in the Playground](/ai-studio/test-your-ai-agent-in-playground)