We have an automation to upload multiple attachments at once and match them to existing records in Airtable based on a unique identifier. See this article to learn more. If you're looking to create many records in bulk, have a look at this article!
💡 Note: If you just need to upload many files together, Airtable has a built-in feature that allows bulk uploading of files without the need for third-party tools. You can refer to this support article for more information.
However, it is important to note that this method only allows for the creation of new records through uploaded attachments.