How do I export site files as a CSV, also how do I convert PNG files to CSV so I can import into my collection

https://support.wix.com/en/article/exporting-data-from-a-database-collection
https://support.wix.com/en/article/corvid-tutorial-importing-and-exporting-collection-data-with-code

Let me explain further I have a number of PNG files on my computer which I which to add to a collection on the WIX database, how can I achieve this. I understand you can only import CSV files so how do I achieve this

Let me explain further I have a number of PNG files on my computer which I which to add to a collection on the WIX database, how can I achieve this. I understand you can only import CSV files so how do I achieve this