From 029ffd2761ceea680feec9fee9143f049ea3a565 Mon Sep 17 00:00:00 2001
From: vupn0712 <126212736+vupn0712@users.noreply.github.com>
Date: Sat, 20 Dec 2025 21:42:00 +0700
Subject: [PATCH] s3: fix Copy ignoring storage class

Co-authored-by: sys6101 <csvmen@gmail.com>
---
 backend/s3/s3.go | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/backend/s3/s3.go b/backend/s3/s3.go
index 48af2e8e7..246077e3b 100644
--- a/backend/s3/s3.go
+++ b/backend/s3/s3.go
@@ -2928,7 +2928,9 @@ func (f *Fs) Copy(ctx context.Context, src fs.Object, remote string) (fs.Object,
 	req := s3.CopyObjectInput{
 		MetadataDirective: types.MetadataDirectiveCopy,
 	}
-
+	if srcObj.storageClass != nil {
+		req.StorageClass = types.StorageClass(*srcObj.storageClass)
+	}
 	// Build upload options including headers and metadata
 	ci := fs.GetConfig(ctx)
 	uploadOptions := fs.MetadataAsOpenOptions(ctx)
@@ -4501,7 +4503,12 @@ func (o *Object) prepareUpload(ctx context.Context, src fs.ObjectInfo, options [
 		ACL:    types.ObjectCannedACL(o.fs.opt.ACL),
 		Key:    &bucketPath,
 	}
-
+	if tierObj, ok := src.(fs.GetTierer); ok {
+		tier := tierObj.GetTier()
+		if tier != "" {
+			ui.req.StorageClass = types.StorageClass(strings.ToUpper(tier))
+		}
+	}
 	// Fetch metadata if --metadata is in use
 	meta, err := fs.GetMetadataOptions(ctx, o.fs, src, options)
 	if err != nil {