diff --git a/src/main/java/org/cyclops/integratedscripting/core/network/ScriptingData.java b/src/main/java/org/cyclops/integratedscripting/core/network/ScriptingData.java
index e474a8723..82b0d4274 100644
--- a/src/main/java/org/cyclops/integratedscripting/core/network/ScriptingData.java
+++ b/src/main/java/org/cyclops/integratedscripting/core/network/ScriptingData.java
@@ -105,6 +105,9 @@ public void initialize() {
             e.printStackTrace();
         }
 
+        // Register watcher for all disk directories
+        this.registerAbsolutePathWatcher(disksPath);
+
         // Collect all disk ids
         List<Integer> diskIds = Lists.newArrayList();
         try {
@@ -248,6 +251,7 @@ public void setScripts(int disk, Map<Path, String> scripts, ChangeLocation chang
             }
 
             // Register watchers for all directories
+            this.registerPathWatcher(disk, null);
             for (Path path : scripts.keySet()) {
                 this.registerPathWatcher(disk, path.getParent());
             }
@@ -299,9 +303,16 @@ public void setScript(int disk, Path scriptPathRelative, @Nullable String script
     protected void registerPathWatcher(int diskId, @Nullable Path pathRelative) {
         Path diskPath = getDiskPath(diskId);
         Path pathAbsolute = pathRelative == null ? diskPath : diskPath.resolve(pathRelative);
+        this.registerAbsolutePathWatcher(pathAbsolute);
+    }
+
+    protected void registerAbsolutePathWatcher(Path pathAbsolute) {
         if (!pathWatchers.containsKey(pathAbsolute)) {
             try {
-                WatchKey watchKey = pathAbsolute.register(watchService, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_MODIFY, StandardWatchEventKinds.ENTRY_DELETE);
+                WatchKey watchKey = pathAbsolute.register(watchService,
+                        StandardWatchEventKinds.ENTRY_CREATE,
+                        StandardWatchEventKinds.ENTRY_MODIFY,
+                        StandardWatchEventKinds.ENTRY_DELETE);
                 pathWatchers.put(pathAbsolute, watchKey);
                 pathWatchersReverse.put(watchKey, pathAbsolute);
             } catch (IOException e) {
@@ -366,6 +377,8 @@ protected void flushScript(int disk, Path scriptPathRelative) {
             } else {
                 scriptPathAbsolute.getParent().toFile().mkdirs();
                 FileUtils.write(scriptPathAbsolute.toFile(), script, StandardCharsets.UTF_8);
+                this.registerPathWatcher(disk, null);
+                this.registerPathWatcher(disk, scriptPathRelative.getParent());
             }
         } catch (IOException e) {
             e.printStackTrace();
diff --git a/src/test/java/org/cyclops/integratedscripting/core/network/ScriptingDataTest.java b/src/test/java/org/cyclops/integratedscripting/core/network/ScriptingDataTest.java
new file mode 100644
index 000000000..041f0e360
--- /dev/null
+++ b/src/test/java/org/cyclops/integratedscripting/core/network/ScriptingDataTest.java
@@ -0,0 +1,105 @@
+package org.cyclops.integratedscripting.core.network;
+
+import org.apache.commons.io.FileUtils;
+import org.cyclops.integratedscripting.api.network.IScriptingData;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.CoreMatchers.hasItem;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+public class ScriptingDataTest {
+
+    private static final int AWAIT_TIMEOUT_MS = 20000;
+    private static final int ATTEMPT_TIMEOUT_MS = 750;
+    private static final int POLLING_INTERVAL_MS = 25;
+
+    @Test
+    public void testExternalUpdatesOnRuntimeCreatedDiskFolderSynced() throws IOException, InterruptedException {
+        Path rootPath = Files.createTempDirectory("integratedscripting-test");
+        ScriptingData scriptingData = new ScriptingData(rootPath);
+        try {
+            scriptingData.initialize();
+            Path diskPath = rootPath.resolve("scripting-disks").resolve("123");
+            Files.createDirectories(diskPath);
+            awaitCondition(() -> scriptingData.getDisks().contains(123));
+
+            Path scriptPath = Path.of("main.js");
+            int observedValue = writeScriptValueUntilObserved(
+                    scriptingData, 123, diskPath.resolve(scriptPath), scriptPath, 1);
+            assertThat(scriptingData.getDisks(), hasItem(123));
+            assertThat(scriptingData.getScripts(123).get(scriptPath), equalTo(scriptValue(observedValue)));
+        } finally {
+            scriptingData.close();
+            FileUtils.deleteDirectory(rootPath.toFile());
+        }
+    }
+
+    @Test
+    public void testExternalUpdatesOnRuntimeFirstUsedDiskSynced() throws IOException, InterruptedException {
+        Path rootPath = Files.createTempDirectory("integratedscripting-test");
+        ScriptingData scriptingData = new ScriptingData(rootPath);
+        try {
+            scriptingData.initialize();
+            Path diskPath = rootPath.resolve("scripting-disks").resolve("456");
+            Path scriptPath = Path.of("main.js");
+
+            scriptingData.setScript(456, scriptPath, scriptValue(1), IScriptingData.ChangeLocation.MEMORY);
+            scriptingData.tick();
+            assertTrue(Files.exists(diskPath.resolve(scriptPath)));
+
+            int observedValue = writeScriptValueUntilObserved(
+                    scriptingData, 456, diskPath.resolve(scriptPath), scriptPath, 2);
+
+            assertThat(scriptingData.getScripts(456).get(scriptPath), equalTo(scriptValue(observedValue)));
+        } finally {
+            scriptingData.close();
+            FileUtils.deleteDirectory(rootPath.toFile());
+        }
+    }
+
+    private static void awaitCondition(Condition condition) throws InterruptedException {
+        assertTrue("Timed out waiting for condition", awaitCondition(condition, AWAIT_TIMEOUT_MS));
+    }
+
+    private static boolean awaitCondition(Condition condition, int timeoutMs) throws InterruptedException {
+        long deadline = System.currentTimeMillis() + timeoutMs;
+        while (System.currentTimeMillis() < deadline) {
+            if (condition.matches()) {
+                return true;
+            }
+            Thread.sleep(POLLING_INTERVAL_MS);
+        }
+        return condition.matches();
+    }
+
+    private static int writeScriptValueUntilObserved(ScriptingData scriptingData, int disk, Path scriptPathAbsolute,
+                                                     Path scriptPathRelative, int startValue) throws IOException, InterruptedException {
+        int value = startValue;
+        long deadline = System.currentTimeMillis() + AWAIT_TIMEOUT_MS;
+        while (System.currentTimeMillis() < deadline) {
+            String expectedScriptValue = scriptValue(value);
+            Files.writeString(scriptPathAbsolute, expectedScriptValue);
+            if (awaitCondition(() -> expectedScriptValue.equals(scriptingData.getScripts(disk).get(scriptPathRelative)),
+                    ATTEMPT_TIMEOUT_MS)) {
+                return value;
+            }
+            value++;
+        }
+        throw new AssertionError("Timed out waiting for script update after repeated writes");
+    }
+
+    private static String scriptValue(int value) {
+        return "export const value = " + value + ";";
+    }
+
+    @FunctionalInterface
+    private interface Condition {
+        boolean matches();
+    }
+}