fix: set file times after writing to preserve source mtime

src/main.rs

@@ -112,6 +112,15 @@ fn extract_exfat_elements(
                 let dest_path = output_dir.join(file.name());
                 let mut dest = File::create(&dest_path)?;
 
+                {
+                    let mut writer = BufWriter::with_capacity(256 * 1024, &mut dest);
+                    std::io::copy(file, &mut writer)?;
+                    writer.flush()?;
+                }
+                pb.inc(file.len());
+
+                // set_times must run after writes — otherwise the kernel
+                // updates mtime/atime back to "now" when bytes are flushed.
                 let accessed = exfat_timestamp_to_system_time(file.timestamps().accessed());
                 let modified = exfat_timestamp_to_system_time(file.timestamps().modified());
                 if let (Ok(accessed), Ok(modified)) = (accessed, modified) {
@@ -126,12 +135,6 @@ fn extract_exfat_elements(
                         );
                     }
                 }
-
-                let mut writer = BufWriter::with_capacity(256 * 1024, &mut dest);
-
-                std::io::copy(file, &mut writer)?;
-                writer.flush()?;
-                pb.inc(file.len());
             }
             FsElement::D(directory) => {
                 let dest_path = output_dir.join(directory.name());