diff --git a/cmd/mount/read.go b/cmd/mount/read.go
index fdaf569e0..3cd88522b 100644
--- a/cmd/mount/read.go
+++ b/cmd/mount/read.go
@@ -29,7 +29,7 @@ func newReadFileHandle(o fs.Object) (*ReadFileHandle, error) {
 	}
 	fh := &ReadFileHandle{
 		o: o,
-		r: fs.NewAccount(r, o), // account the transfer
+		r: fs.NewAccountWithBuffer(r, o), // account the transfer
 	}
 	fs.Stats.Transferring(fh.o.Remote())
 	return fh, nil
@@ -68,7 +68,6 @@ func (fh *ReadFileHandle) seek(offset int64, reopen bool) error {
 		if err != nil {
 			fs.Debugf(fh.o, "ReadFileHandle.Read seek close old failed: %v", err)
 		}
-		// fh.r = fs.NewAccount(r, fh.o) // account the transfer
 		fh.r.UpdateReader(r)
 	}
 	fh.offset = offset
diff --git a/cmd/mount/write.go b/cmd/mount/write.go
index 89fd6ddee..589b6231c 100644
--- a/cmd/mount/write.go
+++ b/cmd/mount/write.go
@@ -38,7 +38,7 @@ func newWriteFileHandle(d *Dir, f *File, src fs.ObjectInfo) (*WriteFileHandle, e
 		file:   f,
 	}
 	fh.pipeReader, fh.pipeWriter = io.Pipe()
-	r := fs.NewAccountSizeName(fh.pipeReader, 0, src.Remote()) // account the transfer
+	r := fs.NewAccountSizeNameWithBuffer(fh.pipeReader, 0, src.Remote()) // account the transfer
 	go func() {
 		o, err := d.f.Put(r, src)
 		fh.o = o