While data is in the "awaiting curation" phase, you can make changes or add more information, but you cannot add more files.
Once a dataset has been curated, the creator is no longer able to update it in the Data Catalog system. If you need to make any changes to your dataset after it has been curated, whether it is an update to the metadata or to the files, email the Data Catalog team.
If your dataset file needs to be replaced by a newer file, the Data Catalog team can make this update for you by uploading the new file and deprecating the old one. This would keep your record up to date with the newest data. We only do this when the new file is inclusive of the old data, such as a dataset that is updated quarterly or annually by adding new data. This allows the old files to still be found, but the newest and most up-to-date file is the most readily available. This also provides a consistent DOI for the project while documenting the updates in the file history on the record. Please email the Data Catalog team if you anticipate this being the case for one or your datasets.