diff --git a/packages/upup/src/frontend/components/MainBox.tsx b/packages/upup/src/frontend/components/MainBox.tsx
index 65ab111f..f84cbf7b 100644
--- a/packages/upup/src/frontend/components/MainBox.tsx
+++ b/packages/upup/src/frontend/components/MainBox.tsx
@@ -10,11 +10,15 @@ import AdapterView from './AdapterView'
 import FileList from './FileList'
 import MyAnimatePresence from './shared/MyAnimatePresence'
 import ShouldRender from './shared/ShouldRender'
+import WarningAlert from './WarningAlert'
+
 export default function MainBox() {
     const {
         files,
         activeAdapter,
         isAddingMore,
+        warningMessage,
+        clearWarning,
         props: { dark },
     } = useRootContext()
     const {
@@ -50,6 +54,13 @@ export default function MainBox() {
                 onDragLeave={handleDragLeave}
                 onDrop={handleDrop}
             >
+                <ShouldRender if={!!warningMessage}>
+                    <WarningAlert
+                        message={warningMessage}
+                        onClose={clearWarning}
+                        dark={dark}
+                    />
+                </ShouldRender>
                 <ShouldRender if={!!activeAdapter}>
                     <AdapterView />
                 </ShouldRender>
diff --git a/packages/upup/src/frontend/components/WarningAlert.tsx b/packages/upup/src/frontend/components/WarningAlert.tsx
new file mode 100644
index 00000000..f3a5dab5
--- /dev/null
+++ b/packages/upup/src/frontend/components/WarningAlert.tsx
@@ -0,0 +1,59 @@
+import { motion } from 'framer-motion'
+import React from 'react'
+import { TbAlertCircle, TbX } from 'react-icons/tb'
+import { cn } from '../lib/tailwind'
+
+interface WarningAlertProps {
+    message: string
+    onClose: () => void
+    dark?: boolean
+}
+
+export default function WarningAlert({
+    message,
+    onClose,
+    dark = false,
+}: WarningAlertProps) {
+    return (
+        <motion.div
+            initial={{ opacity: 0, y: -10 }}
+            animate={{ opacity: 1, y: 0 }}
+            exit={{ opacity: 0, y: -10 }}
+            className={cn(
+                'upup-absolute upup-left-4 upup-right-4 upup-top-4 upup-z-50',
+                'upup-flex upup-items-center upup-gap-2',
+                'upup-rounded-lg upup-px-4 upup-py-3 upup-shadow-lg',
+                'upup-mx-auto upup-max-w-lg',
+                {
+                    'upup-border upup-border-amber-200 upup-bg-amber-50 upup-text-amber-900':
+                        !dark,
+                    'upup-border upup-border-amber-700 upup-bg-amber-900/90 upup-text-amber-100':
+                        dark,
+                },
+            )}
+        >
+            <TbAlertCircle
+                className={cn('upup-h-5 upup-w-5 upup-flex-shrink-0', {
+                    'upup-text-amber-600': !dark,
+                    'upup-text-amber-300': dark,
+                })}
+            />
+            <p className="upup-flex-1 upup-break-words upup-text-sm upup-font-medium">
+                {message}
+            </p>
+            <button
+                onClick={onClose}
+                className={cn(
+                    'upup-flex-shrink-0 upup-rounded upup-p-1 upup-transition-colors',
+                    {
+                        'upup-text-amber-600 hover:upup-bg-amber-100': !dark,
+                        'upup-text-amber-300 hover:upup-bg-amber-800': dark,
+                    },
+                )}
+                aria-label="Close warning"
+            >
+                <TbX className="upup-h-4 upup-w-4" />
+            </button>
+        </motion.div>
+    )
+}
diff --git a/packages/upup/src/frontend/context/RootContext.ts b/packages/upup/src/frontend/context/RootContext.ts
index b5afd38e..b87690ea 100644
--- a/packages/upup/src/frontend/context/RootContext.ts
+++ b/packages/upup/src/frontend/context/RootContext.ts
@@ -81,6 +81,8 @@ export interface IRootContext {
     googleDriveConfigs?: GoogleDriveConfigs
     dropboxConfigs?: DropboxConfigs
     upload: ContextUpload
+    warningMessage: string
+    clearWarning: () => void
     props: ContextProps
 }
 
diff --git a/packages/upup/src/frontend/hooks/useRootProvider.ts b/packages/upup/src/frontend/hooks/useRootProvider.ts
index 1cfa7bbf..8cbcbb8d 100644
--- a/packages/upup/src/frontend/hooks/useRootProvider.ts
+++ b/packages/upup/src/frontend/hooks/useRootProvider.ts
@@ -77,6 +77,7 @@ export default function useRootProvider({
         {} as FilesProgressMap,
     )
     const [uploadError, setUploadError] = useState('')
+    const [warningMessage, setWarningMessage] = useState<string>('')
 
     // Keep a ref to selectedFilesMap for unmount cleanup
     const selectedFilesMapRef = useRef(selectedFilesMap)
@@ -118,10 +119,16 @@ export default function useRootProvider({
 
     const onWarn = useCallback(
         (message: string) => {
+            setWarningMessage(message)
             if (warningHandler) warningHandler(message)
         },
         [warningHandler],
     )
+
+    const clearWarning = useCallback(() => {
+        setWarningMessage('')
+    }, [])
+
     function isFileWithParamsArray(
         files: File[] | FileWithParams[],
     ): files is FileWithParams[] {
@@ -166,11 +173,22 @@ export default function useRootProvider({
 
         // Collect only the files that are actually accepted and added in this batch.
         const addedThisBatch: FileWithParams[] = []
+        const totalSelectedFiles = newFiles.length
 
         for (const file of newFiles) {
             // Respect the limit strictly; stop when capacity is reached.
             if (newFilesMap.size >= limit) {
-                onWarn('Allowed limit has been surpassed!')
+                const remainingCount =
+                    totalSelectedFiles - addedThisBatch.length
+                onWarn(
+                    `You selected ${totalSelectedFiles} file${
+                        totalSelectedFiles > 1 ? 's' : ''
+                    }. Only ${limit} ${
+                        limit > 1 ? 'were' : 'was'
+                    } added. ${remainingCount} file${
+                        remainingCount > 1 ? 's' : ''
+                    } ignored.`,
+                )
                 break
             }
 
@@ -278,6 +296,7 @@ export default function useRootProvider({
             if (!selectedFilesMap.size && !dynamicFiles) return
             setUploadStatus(UploadStatus.ONGOING)
             setUploadError('')
+            clearWarning()
             const sendEvent = !dynamicFiles
             const selectedFiles = dynamicFiles
                 ? dynamicFiles
@@ -363,6 +382,7 @@ export default function useRootProvider({
             onError,
             onFileUploadProgress,
             onFilesUploadProgress,
+            clearWarning,
         ],
     )
     const handleCancel = useCallback(() => {
@@ -404,6 +424,8 @@ export default function useRootProvider({
             setUploadStatus,
             uploadError,
         },
+        warningMessage,
+        clearWarning,
         props: {
             mini,
             dark,