Add KB article on increasing file uploader limit

content/kb/deployments/increase-upload-limit-cloud.md

@@ -0,0 +1,46 @@
+---
+title: How do I increase the upload limit of st.file_uploader on Streamlit Cloud?
+slug: /knowledge-base/deploy/increase-file-uploader-limit-streamlit-cloud
+---
+
+# How do I increase the upload limit of st.file_uploader on Streamlit Cloud?
+
+## Overview
+
+By default, files uploaded using [`st.file_uploader()`](/library/api-reference/widgets/st.file_uploader) are limited to 200MB. You can configure this using the `server.maxUploadSize` config option.
+
+Streamlit provides [four different ways to set configuration options](/library/advanced-features/configuration#set-configuration-options):
+
+1. In a **global config file** at `~/.streamlit/config.toml` for macOS/Linux or `%userprofile%/.streamlit/config.toml` for Windows:
+   ```toml
+   [server]
+   maxUploadSize = 200
+   ```
+2. In a **per-project config file** at `$CWD/.streamlit/config.toml`, where `$CWD` is the folder you're running Streamlit from.
+3. Through `STREAMLIT_*` **environment variables**, such as:
+   ```shell
+   export STREAMLIT_SERVER_MAX_UPLOAD_SIZE=200
+   ```
+4. As **flags on the command line** when running `streamlit run`:
+   ```shell
+   streamlit run your_script.py --server.maxUploadSize 200
+   ```
+
+Which of the four options should you choose for an app deployed to [Streamlit Cloud](/streamlit-cloud)? 🤔
+
+## Solution
+
+When deploying your app to Streamlit Cloud, you should **use option 1**. Namely, set the `maxUploadSize` config option in a global config file (`.streamlit/config.toml`) uploaded to your app's GitHub repo. 🎈
+
+For example, to increase the upload limit to 400MB, upload a `.streamlit/config.toml` file containing the following lines to your app's GitHub repo:
+
+```toml
+[server]
+maxUploadSize = 400
+```
+
+## Relevant resources
+
+- [Streamlit drag and drop capping at 200MB, need workaround](https://discuss.streamlit.io/t/streamlit-drag-and-drop-capping-at-200mb-need-workaround/19803/2)
+- [File uploader widget API](/library/api-reference/widgets/st.file_uploader)
+- [How to set Streamlit configuration options](/library/advanced-features/configuration#set-configuration-options)

content/kb/deployments/index.md

@@ -15,3 +15,4 @@ slug: /knowledge-base/deploy
 - [Authentication without SSO](/knowledge-base/deploy/authentication-without-sso)
 - [Upgrade the Streamlit version of your app on Streamlit Cloud](/knowledge-base/deploy/upgrade-streamlit-version-on-streamlit-cloud)
 - [Organizing your apps with workspaces on Streamlit Cloud](/knowledge-base/deploy/organizing-apps-workspaces-streamlit-cloud)
+- [How do I increase the upload limit of `st.file_uploader` on Streamlit Cloud?](/knowledge-base/deploy/increase-file-uploader-limit-streamlit-cloud)