1. For each of your tracks, create a folder with the respective track's name.
2. Place all your audio files in this folder.
3. Go to WeTransfer and click on the menu represented by three small dots.
4. Select the "Download link" option.
5. Upload your folder to WeTransfer.
6. Wait for the upload to complete.
7. Once the upload is finished, you will receive a download link.

To streamline the ordering process, repeat this operation for each track, obtaining a separate WeTransfer link for each piece you want to submit.