The Deliver Files page can be used to upload files directly within your NetGalley client account by dragging/dropping multiple files for upload, including large files (such as Audiobook files). This page is found on your Dashboard, in the "Your Titles" section:
Once here, you can drag and drop your files from your computer or click to upload them directly.
Once uploaded, your files will process within two hours and will then appear on the individual Title Details page(s).
If you prefer to upload files more quickly, you can do so from the Title Details page (Upload/Preview File) as long as they are less than 80MB.
Please Note: Each Reading Option has its own file size limitations, so be sure you're still following NetGalley's file size requirements.