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Step 3 – Uploading Files

Limits

Limit Value Source
Max files per deposit 100 Zenodo policy
Max total deposit size 50 GB Zenodo policy
Single file size No hard limit Subject to total

How to add files

  1. Drag and drop files onto the upload area, or click the area to open a file browser.
  2. Files appear in the list immediately with their name and size.
  3. The running total (files / size) is shown in the counter bar.
  4. Click the ✕ next to any file to remove it before uploading.

Uploading

Click Upload N files to begin. Files are uploaded sequentially — each one is streamed directly from your browser to Zenodo's storage via the backend.

No server-side storage

The backend acts as a transparent proxy. File bytes pass through memory only and are never written to disk on the server.

Progress indicators

  • A progress bar appears under each filename while uploading.
  • A green tick (✓) confirms successful upload.
  • A red warning icon shows the error message if a file fails — you can retry by clicking Upload N files again (already-uploaded files are skipped).

After uploading

Once all files show a green tick, click Review & Publish to proceed.

Large files

Files over a few hundred MB may take several minutes depending on your connection. Keep the browser tab open during upload. The session will not time out mid-transfer.