diff --git a/frontend/src/index.jsx b/frontend/src/index.jsx
index cd064bc..39f2c8b 100644
--- a/frontend/src/index.jsx
+++ b/frontend/src/index.jsx
@@ -3050,122 +3050,122 @@ const AppLayout = () => {
     }
 
     const items = Array.from(dataTransfer.items || []);
-    const results = [];
+    console.info('[Uploads] drop start', { items: items.length, files: (dataTransfer.files || []).length });
 
-    const pushFile = (file, ancestors) => {
-      if (file) {
-        results.push({
-          file,
-          segments: (ancestors || []).filter(Boolean),
+    const results = [];
+    const seenKeys = new Set();
+
+    const pushFile = (file, ancestors = []) => {
+      if (!file) return;
+      const segments = (ancestors || []).filter(Boolean);
+      const key = `${segments.join('/')}/${file.name}:${file.size}`;
+      if (seenKeys.has(key)) {
+        // skipped duplicate
+        return;
+      }
+      seenKeys.add(key);
+      results.push({ file, segments });
+      // queued file
+    };
+
+    const readAllEntries = async (reader) => {
+      const entries = [];
+      while (true) {
+        // eslint-disable-next-line no-await-in-loop
+        const batch = await new Promise((resolve, reject) => reader.readEntries(resolve, reject));
+        if (!batch.length) {
+          break;
+        }
+        entries.push(...batch);
+      }
+      return entries;
+    };
+
+    const walkEntry = async (entry, ancestors = []) => {
+      if (!entry) return;
+      if (entry.isFile) {
+        const file = await new Promise((resolve, reject) => {
+          try {
+            entry.file(resolve, reject);
+          } catch (error) {
+            console.warn('[Uploads] entry.file failed', error);
+            reject(error);
+          }
         });
+        pushFile(file, ancestors);
+        return;
+      }
+      if (entry.isDirectory) {
+        const nextAncestors = entry.name ? [...ancestors, entry.name] : [...ancestors];
+        const reader = entry.createReader();
+        const entries = await readAllEntries(reader);
+        for (const child of entries) {
+          // eslint-disable-next-line no-await-in-loop
+          await walkEntry(child, nextAncestors);
+        }
       }
     };
 
-    const supportsFileSystemAccess =
-      window.isSecureContext &&
-      items.some((item) => typeof item.getAsFileSystemHandle === 'function');
-    const supportsWebkitEntries = items.some(
-      (item) => typeof item.webkitGetAsEntry === 'function',
+    await Promise.all(
+      items.map(async (item, index) => {
+        if (item.kind !== 'file') return;
+
+        const fileFromItem = typeof item.getAsFile === 'function' ? item.getAsFile() : null;
+        if (fileFromItem) {
+          const relativePath =
+            typeof fileFromItem.webkitRelativePath === 'string' ? fileFromItem.webkitRelativePath : '';
+          const segments = relativePath
+            ? relativePath
+                .split('/')
+                .slice(0, -1)
+                .filter(Boolean)
+            : [];
+          pushFile(fileFromItem, segments);
+        }
+
+        if (typeof item.webkitGetAsEntry === 'function') {
+          try {
+            const entry = item.webkitGetAsEntry();
+            if (entry) {
+              // processing entry
+              await walkEntry(entry, []);
+              return;
+            }
+          } catch (error) {
+            console.warn('[Uploads] webkitGetAsEntry failed', error);
+          }
+        }
+
+        if (!fileFromItem) {
+          console.info('[Uploads] item missing file handle', index);
+        }
+      }),
     );
 
-    if (supportsFileSystemAccess) {
-      const walkDirectoryHandle = async (handle, ancestors) => {
-        const nextAncestors = handle.name ? [...ancestors, handle.name] : [...ancestors];
-        for await (const child of handle.values()) {
-          if (child.kind === 'file') {
-            const file = await child.getFile();
-            pushFile(file, nextAncestors);
-          } else if (child.kind === 'directory') {
-            // eslint-disable-next-line no-await-in-loop
-            await walkDirectoryHandle(child, nextAncestors);
-          }
-        }
-      };
-
-      for (const item of items) {
-        if (item.kind !== 'file') continue;
-        const getHandle = item.getAsFileSystemHandle?.bind(item);
-        if (!getHandle) {
-          continue;
-        }
-
-        // eslint-disable-next-line no-await-in-loop
-        const handle = await getHandle();
-        if (!handle) continue;
-
-        if (handle.kind === 'file') {
-          // eslint-disable-next-line no-await-in-loop
-          const file = await handle.getFile();
-          pushFile(file, []);
-        } else if (handle.kind === 'directory') {
-          // eslint-disable-next-line no-await-in-loop
-          await walkDirectoryHandle(handle, []);
-        }
-      }
-    } else if (supportsWebkitEntries) {
-      const walkWebkitEntry = async (entry, ancestors) => {
-        if (!entry) return;
-        if (entry.isFile) {
-          const file = await new Promise((resolve, reject) => {
-            entry.file(resolve, reject);
-          });
-          pushFile(file, ancestors);
-          return;
-        }
-        if (entry.isDirectory) {
-          const nextAncestors = entry.name ? [...ancestors, entry.name] : [...ancestors];
-          const reader = entry.createReader();
-          const readEntries = () =>
-            new Promise((resolve, reject) => {
-              reader.readEntries(resolve, reject);
-            });
-
-          // eslint-disable-next-line no-constant-condition
-          while (true) {
-            // eslint-disable-next-line no-await-in-loop
-            const batch = await readEntries();
-            if (!batch.length) {
-              break;
-            }
-            // eslint-disable-next-line no-await-in-loop
-            for (const child of batch) {
-              // eslint-disable-next-line no-await-in-loop
-              await walkWebkitEntry(child, nextAncestors);
-            }
-          }
-        }
-      };
-
-      for (const item of items) {
-        const entry =
-          typeof item.webkitGetAsEntry === 'function' ? item.webkitGetAsEntry() : null;
-        if (!entry) continue;
-        // eslint-disable-next-line no-await-in-loop
-        await walkWebkitEntry(entry, []);
-      }
-    } else {
-      const files = Array.from(dataTransfer.files || []);
-      files.forEach((file) => {
-        if (!file) return;
-        const relativePath =
-          typeof file.webkitRelativePath === 'string' ? file.webkitRelativePath : '';
-        const segments = relativePath
-          ? relativePath
-              .split('/')
-              .slice(0, -1)
-              .filter(Boolean)
-          : [];
-        pushFile(file, segments);
-      });
-    }
+    Array.from(dataTransfer.files || []).forEach((file, index) => {
+      if (!file) return;
+      // FileList entry suppressed
+      const relativePath =
+        typeof file.webkitRelativePath === 'string' ? file.webkitRelativePath : '';
+      const segments = relativePath
+        ? relativePath
+            .split('/')
+            .slice(0, -1)
+            .filter(Boolean)
+        : [];
+      pushFile(file, segments);
+    });
 
     if (!results.length) {
       throw new Error('No files detected in drop payload.');
     }
 
+    console.info('[Uploads] prepared files', results.length);
+
     return results;
   }, []);
 
+
   const handleFileDrop = useCallback(
     async (dataTransfer, targetFolderId) => {
       if (!token) {