Optionalexpires_Expiration timestamp (Date object or ISO 8601 string)
Array of files with base64-encoded content
Optionalis_Whether files should be publicly accessible
OptionalmetadataAdditional metadata as key-value pairs
Directory path where files should be uploaded
OptionalrefReference identifier for the upload operation
OptionalreplaceIf true, replace files if they already exist
Payload for base64/JSON upload