Check what failed
An upload error means the file transfer or save did not complete. A safety check in progress means the file needs scanning before publication. Read the message beside the affected file so you do not repeat a successful upload.
Check the file before retrying
Use a supported digital file and keep each file within the 250 MB upload limit. If the file is corrupt or cannot be opened, repair it first. Encrypted archives cannot pass the safety check. Do not change a file extension to bypass validation.
Resume the existing draft
Return to your saved draft in Products. Check which files are already present, then retry only the missing or failed file with a stable connection. Wait for the upload to finish before continuing. Repeatedly starting new products makes the problem harder to track.
If it still fails
Contact support with the file type, size, exact error and the step that failed. Do not attach a paid product file unless support requests it. A failed safety check needs review; it is not resolved by approving the preview.