When assets (covers, content files such as ePub and PDF files, or manifests) are added to the _INBOX on ftp.netgalley.com and successfully import into your NetGalley publisher account, you will receive a NetGalley Import Report email.
The email is sent to the email address specified in the File Import Notices field in your publisher account. (How do I change that?)
If you have added an asset to the _INBOX at ftp.netgalley.com, and it is not included in the email report and is not available in your NetGalley account, double check that your files are named correctly and uploaded into the _INBOX folder on ftp.netgalley.com, using these exact instructions. Re-upload the file if it was misnamed the first time.