diff --git a/src/components/UnifiedDataBar/FilesTab.module.css b/src/components/UnifiedDataBar/FilesTab.module.css
index d992368..e8889ae 100644
--- a/src/components/UnifiedDataBar/FilesTab.module.css
+++ b/src/components/UnifiedDataBar/FilesTab.module.css
@@ -81,6 +81,60 @@
   flex-wrap: wrap;
 }
 
+.uploadCircleButton {
+  background: none;
+  border: none;
+  cursor: pointer;
+  font-size: 12px;
+  color: #f25843;
+  width: 26px;
+  height: 26px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+}
+
+.uploadCircleButton:disabled {
+  cursor: not-allowed;
+}
+
+.uploadCircleWrap {
+  position: relative;
+  width: 22px;
+  height: 22px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.uploadCircleSvg {
+  position: absolute;
+  inset: 0;
+  transform: rotate(-90deg);
+}
+
+.uploadCircleTrack {
+  fill: none;
+  stroke: rgba(242, 88, 67, 0.25);
+  stroke-width: 2;
+}
+
+.uploadCircleProgress {
+  fill: none;
+  stroke: #f25843;
+  stroke-width: 2;
+  stroke-linecap: round;
+  transition: stroke-dashoffset 120ms linear;
+}
+
+.uploadCircleText {
+  font-size: 8px;
+  font-weight: 700;
+  line-height: 1;
+  color: #f25843;
+}
+
 @media (prefers-color-scheme: dark) {
   .fileRow:hover {
     background: rgba(255, 255, 255, 0.05);
diff --git a/src/components/UnifiedDataBar/FilesTab.tsx b/src/components/UnifiedDataBar/FilesTab.tsx
index 5a13127..87d7675 100644
--- a/src/components/UnifiedDataBar/FilesTab.tsx
+++ b/src/components/UnifiedDataBar/FilesTab.tsx
@@ -28,6 +28,8 @@ const FilesTab: React.FC<FilesTabProps> = ({ context, onFileSelect, onSendToChat
   const { showSuccess, showError } = useToast();
   const [isDragOver, setIsDragOver] = useState(false);
   const [uploading, setUploading] = useState(false);
+  const [uploadProgressPercent, setUploadProgressPercent] = useState(0);
+  const uploadRunIdRef = useRef(0);
   const fileInputRef = useRef<HTMLInputElement>(null);
 
   const provider = useMemo(() => createFolderFileProvider(), []);
@@ -54,21 +56,41 @@ const FilesTab: React.FC<FilesTabProps> = ({ context, onFileSelect, onSendToChat
 
   const _uploadFiles = useCallback(async (fileList: FileList | File[]) => {
     if (!context.instanceId || uploading) return;
+    uploadRunIdRef.current += 1;
+    const runId = uploadRunIdRef.current;
     setUploading(true);
+    setUploadProgressPercent(0);
     try {
-      for (const file of Array.from(fileList)) {
+      const files = Array.from(fileList);
+      const totalFiles = files.length || 1;
+      for (const [index, file] of files.entries()) {
         const formData = new FormData();
         formData.append('file', file);
         formData.append('featureInstanceId', context.instanceId);
         await api.post('/api/files/upload', formData, {
           headers: { 'Content-Type': 'multipart/form-data' },
+          onUploadProgress: progressEvent => {
+            if (uploadRunIdRef.current !== runId) return;
+            if (!progressEvent.total) return;
+            const fileProgress = Math.min(100, Math.round((progressEvent.loaded * 100) / progressEvent.total));
+            const baseProgress = (index / totalFiles) * 100;
+            const scaledFileProgress = fileProgress / totalFiles;
+            setUploadProgressPercent(Math.min(100, Math.round(baseProgress + scaledFileProgress)));
+          },
         });
       }
+      if (uploadRunIdRef.current === runId) setUploadProgressPercent(100);
       _handleRefresh();
     } catch (err) {
       console.error('File upload failed:', err);
     } finally {
-      setUploading(false);
+      if (uploadRunIdRef.current === runId) {
+        setUploading(false);
+        // Let 100% render briefly, then reset.
+        window.setTimeout(() => {
+          if (uploadRunIdRef.current === runId) setUploadProgressPercent(0);
+        }, 250);
+      }
     }
   }, [context.instanceId, uploading, _handleRefresh]);
 
@@ -135,6 +157,10 @@ const FilesTab: React.FC<FilesTabProps> = ({ context, onFileSelect, onSendToChat
     onSendToChat?.([{ id: node.id, type: node.type === 'folder' ? 'group' : 'file', name: node.name }]);
   }, [onSendToChat]);
 
+  const circleRadius = 11;
+  const circleCircumference = 2 * Math.PI * circleRadius;
+  const circleOffset = circleCircumference * (1 - uploadProgressPercent / 100);
+
   return (
     <div
       className={styles.filesTab}
@@ -170,10 +196,26 @@ const FilesTab: React.FC<FilesTabProps> = ({ context, onFileSelect, onSendToChat
           <button
             onClick={() => fileInputRef.current?.click()}
             disabled={uploading}
-            style={{ background: 'none', border: 'none', cursor: 'pointer', fontSize: 12, color: '#F25843' }}
+            className={styles.uploadCircleButton}
             title={t('Dateien hochladen')}
           >
-            {uploading ? '...' : '+'}
+            {uploading ? (
+              <span className={styles.uploadCircleWrap} aria-hidden="true">
+                <svg className={styles.uploadCircleSvg} viewBox="0 0 24 24">
+                  <circle className={styles.uploadCircleTrack} cx="12" cy="12" r={circleRadius} />
+                  <circle
+                    className={styles.uploadCircleProgress}
+                    cx="12"
+                    cy="12"
+                    r={circleRadius}
+                    style={{ strokeDasharray: `${circleCircumference}`, strokeDashoffset: `${circleOffset}` }}
+                  />
+                </svg>
+                <span className={styles.uploadCircleText}>{uploadProgressPercent}%</span>
+              </span>
+            ) : (
+              '+'
+            )}
           </button>
           <button
             onClick={_handleRefresh}
diff --git a/src/hooks/useFiles.ts b/src/hooks/useFiles.ts
index 704d778..774fe89 100644
--- a/src/hooks/useFiles.ts
+++ b/src/hooks/useFiles.ts
@@ -408,6 +408,7 @@ export function useFileOperations() {
   const [deletingFiles, setDeletingFiles] = useState<Set<string>>(new Set());
   const [editingFiles, setEditingFiles] = useState<Set<string>>(new Set());
   const [uploadingFile, setUploadingFile] = useState(false);
+  const [uploadProgress, setUploadProgress] = useState(0);
   const [isLoading] = useState(false);
   const [downloadError, setDownloadError] = useState<string | null>(null);
   const [deleteError, setDeleteError] = useState<string | null>(null);
@@ -564,9 +565,11 @@ export function useFileOperations() {
     file: globalThis.File,
     workflowId?: string,
     featureInstanceId?: string,
+    onProgress?: (progress: number) => void,
   ) => {
     setUploadError(null);
     setUploadingFile(true);
+    setUploadProgress(0);
     
     try {
       
@@ -593,7 +596,14 @@ export function useFileOperations() {
       
       
       // Do NOT set Content-Type manually – axios sets multipart/form-data with boundary for FormData
-      const response = await api.post('/api/files/upload', formData);
+      const response = await api.post('/api/files/upload', formData, {
+        onUploadProgress: progressEvent => {
+          if (!progressEvent.total) return;
+          const progress = Math.min(100, Math.round((progressEvent.loaded * 100) / progressEvent.total));
+          setUploadProgress(progress);
+          onProgress?.(progress);
+        },
+      });
       const fileData = response.data;
       
       // Check if the response indicates a duplicate file
@@ -625,6 +635,7 @@ export function useFileOperations() {
       return { success: false, error: errorMessage };
     } finally {
       setUploadingFile(false);
+      setUploadProgress(0);
     }
   };
 
@@ -749,6 +760,7 @@ export function useFileOperations() {
     deletingFiles,
     editingFiles,
     uploadingFile,
+    uploadProgress,
     downloadError,
     deleteError,
     uploadError,
diff --git a/src/pages/basedata/FilesPage.tsx b/src/pages/basedata/FilesPage.tsx
index e5dbecd..6bba519 100644
--- a/src/pages/basedata/FilesPage.tsx
+++ b/src/pages/basedata/FilesPage.tsx
@@ -67,7 +67,6 @@ export const FilesPage: React.FC = () => {
     handleInlineUpdate,
     deletingFiles,
     downloadingFiles,
-    uploadingFile,
     previewingFiles,
   } = useFileOperations();
 
@@ -75,6 +74,8 @@ export const FilesPage: React.FC = () => {
   const [selectedFiles, setSelectedFiles] = useState<UserFile[]>([]);
   const [selectedFolderId, setSelectedFolderId] = useState<string | null>(null);
   const [highlightedFileId, setHighlightedFileId] = useState<string | null>(null);
+  const [uploadProgressPercent, setUploadProgressPercent] = useState(0);
+  const [isUploadingBatch, setIsUploadingBatch] = useState(false);
 
   const [treeWidth, setTreeWidth] = useState(300);
   const [treeVisible, setTreeVisible] = useState(true);
@@ -264,24 +265,38 @@ export const FilesPage: React.FC = () => {
   const handleFileSelect = async (e: React.ChangeEvent<HTMLInputElement>) => {
     const picked = e.target.files;
     if (picked && picked.length > 0) {
-      let successCount = 0;
-      let errorCount = 0;
-      for (const file of Array.from(picked)) {
-        const result = await handleFileUpload(file);
-        if (result?.success) successCount++; else errorCount++;
-      }
-      if (fileInputRef.current) fileInputRef.current.value = '';
-      await _tableRefetch();
-      setTreeKey(k => k + 1);
-      if (successCount > 0) {
-        showSuccess(
-          t('Upload erfolgreich'),
-          errorCount > 0
-            ? t('{successCount} Datei(en) hochgeladen, {errorCount} fehlgeschlagen', { successCount, errorCount })
-            : t('{successCount} Datei(en) hochgeladen', { successCount }),
-        );
-      } else if (errorCount > 0) {
-        showError(t('Upload fehlgeschlagen'), t('{errorCount} Datei(en) konnten nicht hochgeladen werden', { errorCount }));
+      setIsUploadingBatch(true);
+      setUploadProgressPercent(0);
+      try {
+        let successCount = 0;
+        let errorCount = 0;
+        const files = Array.from(picked);
+        const totalFiles = files.length;
+        for (const [index, file] of files.entries()) {
+          const result = await handleFileUpload(file, undefined, undefined, fileProgress => {
+            const baseProgress = (index / totalFiles) * 100;
+            const scaledFileProgress = fileProgress / totalFiles;
+            setUploadProgressPercent(Math.min(100, Math.round(baseProgress + scaledFileProgress)));
+          });
+          if (result?.success) successCount++; else errorCount++;
+        }
+        setUploadProgressPercent(100);
+        if (fileInputRef.current) fileInputRef.current.value = '';
+        await _tableRefetch();
+        setTreeKey(k => k + 1);
+        if (successCount > 0) {
+          showSuccess(
+            t('Upload erfolgreich'),
+            errorCount > 0
+              ? t('{successCount} Datei(en) hochgeladen, {errorCount} fehlgeschlagen', { successCount, errorCount })
+              : t('{successCount} Datei(en) hochgeladen', { successCount }),
+          );
+        } else if (errorCount > 0) {
+          showError(t('Upload fehlgeschlagen'), t('{errorCount} Datei(en) konnten nicht hochgeladen werden', { errorCount }));
+        }
+      } finally {
+        setIsUploadingBatch(false);
+        setUploadProgressPercent(0);
       }
     }
   };
@@ -436,8 +451,39 @@ export const FilesPage: React.FC = () => {
             <div style={{ flex: 1 }} />
 
             {canCreate && (
-              <button className={styles.primaryButton} onClick={handleUploadClick} disabled={uploadingFile}>
-                <FaUpload /> {uploadingFile ? t('Wird hochgeladen...') : t('Datei hochladen')}
+              <button
+                className={styles.primaryButton}
+                onClick={handleUploadClick}
+                disabled={isUploadingBatch}
+                style={{ position: 'relative', overflow: 'hidden' }}
+              >
+                {isUploadingBatch && (
+                  <span
+                    aria-hidden="true"
+                    style={{
+                      position: 'absolute',
+                      left: 0,
+                      top: 0,
+                      bottom: 0,
+                      width: `${uploadProgressPercent}%`,
+                      background: 'rgba(255, 255, 255, 0.25)',
+                      transition: 'width 120ms linear',
+                    }}
+                  />
+                )}
+                <span
+                  style={{
+                    position: 'relative',
+                    zIndex: 1,
+                    display: 'inline-flex',
+                    alignItems: 'center',
+                    gap: 6,
+                  }}
+                >
+                  <FaUpload />
+                  <span>{t('Datei hochladen')}</span>
+                  {isUploadingBatch && <span>{uploadProgressPercent}%</span>}
+                </span>
               </button>
             )}
           </div>