diff --git a/README.md b/README.md
index 97a3d50..f79ec9b 100644
--- a/README.md
+++ b/README.md
@@ -11,11 +11,11 @@ Use `assetPrefix` instead of `pathPrefix`
 - A sitemap is no longer required
 - A webmanifest is no longer required
 
-The above two files were hard coded into this plugin in earlier versions. If you still want to move these files to the assets folder, use the new `additionalPaths` option, see below for more information on the option. To get the same behavior as v1, use the following options:
+The above two files were hard coded into this plugin in earlier versions. If you still want to move these files to the assets folder, use the new `paths` option, see below for more information on the option. To get the same behavior as v1, use the following options:
 
 ```javascript
 options: {
-  additionalPaths: ["manifest.webmanifest", "sitemap.xml"],
+  paths: ["manifest.webmanifest", "sitemap.xml"],
 },
 ```
 
@@ -131,11 +131,11 @@ Stops Webpack from generating the .js.map files
 }
 ```
 
-### additionalPaths
+### paths
 
-Default: `[]`
+Default: `["static", "icons", "page-data"]`
 
-Additional paths to files/folders that should be moved to the asset directory.
+The paths of files/folders to be moved to the asset directory.
 
 ```javascript
 // Your gatsby-config.js
@@ -144,7 +144,27 @@ Additional paths to files/folders that should be moved to the asset directory.
     {
       resolve: "gatsby-plugin-asset-path",
       options: {
-        additionalPaths: ['example.txt', 'foo/example.txt', 'bar/'],
+        paths: ["static"],
+      },
+    },
+  ];
+}
+```
+
+### fileTypes
+
+Default: `["js", "css"]`
+
+The types of files in the root `publicFolder` to be moved to the asset directory.
+
+```javascript
+// Your gatsby-config.js
+{
+  plugins: [
+    {
+      resolve: "gatsby-plugin-asset-path",
+      options: {
+        fileTypes: ["js", "map", "css"],
       },
     },
   ];
diff --git a/src/gatsby-node.js b/src/gatsby-node.js
index eaf5ce7..b1cf8c2 100644
--- a/src/gatsby-node.js
+++ b/src/gatsby-node.js
@@ -23,22 +23,28 @@ export const onCreateWebpackConfig = (
  * Moves all js and css files into timestamp-named folder
  * @see {@link https://next.gatsbyjs.org/docs/node-apis/#onPostBuild}
  */
-export const onPostBuild = async ({ pathPrefix }, { additionalPaths = [] }) => {
+export const onPostBuild = async (
+  { pathPrefix }, // this is specified by the 'assetPrefix' parameter in gatsby-config (note 'asset' instead of 'path'!)
+  {
+    additionalPaths = [], // deprecated argument to prevent breaking change
+    paths = ["static", "icons", "page-data"],
+    fileTypes = ["js", "css"],
+  },
+) => {
   const publicFolder = "./public";
   const assetFolder = path.join(publicFolder, `.${pathPrefix}`);
 
-  const copy = (fileOrFolder) => {
-    const currentPath = path.join(publicFolder, fileOrFolder);
-    const newPath = path.join(assetFolder, fileOrFolder);
-    try {
-      if (fs.existsSync(currentPath)) {
-        return fs.copy(currentPath, newPath);
-      }
-    } catch (err) {
-      console.error(err);
-      return Promise.resolve();
-    }
-  };
+  if (additionalPaths.length) {
+    console.warn(
+      `gatsby-plugin-asset-path argument 'additionalPaths' is deprecated, use 'paths'`,
+    );
+  }
+
+  if (pathPrefix === "") {
+    console.error(`gatsby-plugin-asset-path requires both:
+- 'assetPrefix' set in gatsby-config
+- 'gatsby build' to be run with the '--prefix-paths' flag`);
+  }
 
   const move = (fileOrFolder) => {
     const currentPath = path.join(publicFolder, fileOrFolder);
@@ -53,14 +59,15 @@ export const onPostBuild = async ({ pathPrefix }, { additionalPaths = [] }) => {
     }
   };
 
+  const filesExtensions = fileTypes.join("|");
+  const filesRegex = RegExp(`.*.(${filesExtensions})$`);
   const filterFilesIn = (folder) =>
-    fs.readdirSync(folder).filter((file) => /.*\.(js|css)$/.test(file));
+    fs.readdirSync(folder).filter((file) => filesRegex.test(file));
 
   const filesInPublicFolder = filterFilesIn(publicFolder);
-  const directories = ["static", "icons", "page-data"];
-  const thingsToMove = directories
-    .concat(filesInPublicFolder)
-    .concat(additionalPaths);
+  const thingsToMove = paths
+    .concat(additionalPaths)
+    .concat(filesInPublicFolder);
 
   // Move files and directories
   await Promise.all(thingsToMove.map(move));