diff --git a/public/index.html b/public/index.html
index 5e04414..3ec0aaa 100644
--- a/public/index.html
+++ b/public/index.html
@@ -1128,14 +1128,14 @@ async function startUpload() {
 
 // ============================================================
 // HTTP MULTI-PART UPLOAD
-// Small files (<= 32 MB): single presigned PUT direct to S3.
-// Large files (> 32 MB): S3 multipart with presigned part URLs —
-//   browser PUTs each 32 MB chunk directly to S3, 6 in parallel.
+// Small files (<= 8 MB): single presigned PUT direct to S3.
+// Large files (> 8 MB): S3 multipart with presigned part URLs —
+//   browser PUTs each 8 MB chunk directly to S3, 6 in parallel.
 //   Node only signs URLs; file data never touches the server.
 // Falls back to server-proxied chunked upload if presigned fails.
 // ============================================================
 const UPLOAD_CONCURRENCY = 6; // concurrent file uploads
-const CHUNK_SIZE = 32 * 1024 * 1024; // 32 MB per chunk
+const CHUNK_SIZE = 8 * 1024 * 1024; // 8 MB per chunk
 const CHUNKS_PARALLEL = 6; // concurrent chunks per file
 
 // Helper: PUT a blob to a presigned URL, return ETag from response
@@ -1161,7 +1161,7 @@ async function uploadFilePresigned(item, idx) {
   const mime = item.file.type || 'application/octet-stream';
   const totalParts = Math.max(1, Math.ceil(item.file.size / CHUNK_SIZE));
 
-  // Small files (<= 32 MB): single presigned PUT
+  // Small files (<= 8 MB): single presigned PUT
   if (totalParts === 1) {
     setFileStatus(idx, 'uploading', 'Getting URL\u2026');
     const pre = await api('POST', '/api/presigned', {
@@ -1193,7 +1193,7 @@ async function uploadFilePresigned(item, idx) {
     });
   }
 
-  // Large files (> 32 MB): presigned multipart \u2014 browser \u2192 S3 direct
+  // Large files (> 8 MB): presigned multipart \u2014 browser \u2192 S3 direct
   setFileStatus(idx, 'uploading', 'Initiating\u2026');
   const init = await api('POST', '/api/desktop/multipart/init', {
     filename: item.name, prefix: selectedPrefix, size: item.file.size, totalParts,