diff --git a/README.md b/README.md
index 39828cf..ec0f1c7 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ As of November 2021, the plugin is considered in BETA stage. **DO NOT USE IT for
 
 ## Features
 
-- **Amazon S3 or S3-compatible services are supported.** Webdav supports on the plan.
+- **Amazon S3 or S3-compatible services are supported.** Webdav supports on the half way.
 - **Obsidiain Mobile supported.** Vaults can be synced across mobile and desktop devices with the cloud service as the "broker".
 - **[End-to-end encryption](./docs/encryption.md) supported.** Files would be encrypted using openssl format before being sent to the cloud **if** user specify a password.
 - **[Minimal Intrusive](./docs/minimal_intrusive_design.md).**
@@ -35,6 +35,8 @@ As of November 2021, the plugin is considered in BETA stage. **DO NOT USE IT for
 
 ## Usage
 
+### s3
+
 - Prepare your S3 (-compatible) service information: [endpoint, region](https://docs.aws.amazon.com/general/latest/gr/s3.html), [access key id, secret access key](https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/getting-your-credentials.html), bucket name. The bucket should be empty and solely for syncing a vault.
 - Configure (enable) [CORS](https://docs.aws.amazon.com/AmazonS3/latest/userguide/enabling-cors-examples.html) for requests from `app://obsidian.md` and `capacitor://localhost` and `http://localhost`. It's unfortunately required, because the plugin sends requests from a browser-like envirement. And those addresses are tested and found on desktop and ios and android.
 - Download and enable this plugin.
@@ -42,3 +44,9 @@ As of November 2021, the plugin is considered in BETA stage. **DO NOT USE IT for
 - If you want to enable end-to-end encryption, also set a password in settings. If you do not specify a password, the files and folders are synced in plain, original content to the cloud.
 - Click the new "switch" icon on the ribbon (the left sidebar), **every time** you want to sync your vault between local and remote. (No "auto sync" yet.)
 - **Be patient while syncing.** Especially in the first-time sync.
+
+### webdav
+
+- **webdav support is buggy (as of now, 20211122) and considered experimental, so it's hidden by default.** Highly recommend to use the more stable s3.
+- If you decide to give it a try, open settings, and click "Choose service" area five times, then a Notice should show up. Close and open settings again then you will be able to select webdav.
+- Currently webdav server should enable CORS for requests, because of technical limitations of mobile.