The general guidance for file uploads to any Flatfile importer is to keep the size under 1GB. This is due to a GraphQL limit on `Int` values. If you're attempting to upload a file larger than 1GB to Flatfile, you can use GZip to compress the file and upload it. ZIP archiving will not work here, it must be Gzip.
Though Flatfile can process Excel and other file formats, we still suggest that you use a CSV file format for your uploads. Tabbed Excel Files are imported one tab at a time.
In Portal 2.0, the amount of time it would take for an upload to be processed depended entirely on your local hardware. In Portal 3.0, that processing is done on our server, and much more quickly. Portal 3.0 also allows you to interrupt a processing upload once it has begun and return to it later. Do be aware that files larger than 250mb may take longer to upload due to browser limitations.
If you're attempting to upload a larger file and you're seeing errors or issues, please reach out to our support team by emailing firstname.lastname@example.org.