Use the native file picker or drag and drop for quick, low-friction intake.

Normalize files immediately so validation, previews, and progress tracking share one queue shape.

Presign uploads when files are large and keep browser requests short-lived.

• Debounce expensive validation if users can drop many files at once.
• Guard against unsafe MIME values by checking both extension and browser-reported type.

Support camera capture, document scanning, and photo-library selection.

Expect intermittent connectivity and persist draft uploads locally when possible.

Resume large uploads and compress media when quality requirements allow it.

• Permission prompts and background upload limits shape the UX more than on web.
• Chunk uploads when network quality is unpredictable.

Desktop apps often need directory selection, multi-window drag sources, and large file batches.

Show richer metadata early because users are more likely to upload complex payloads.

Checksum before transfer and support resumable jobs for very large files.

• Background workers help when indexing or transforming files before upload.
• Users expect stronger retry controls and clearer queue ownership.