As you can see in the last code snippet, uploadButtonController.onUploadDone() function will give you the uploadedFileMeta. You can save the uploadedFileMeta in your database gallery using Wix Data:

https://www.wix.com/velo/reference/wix-data/introduction

E.g.

```

const { fileUrl, mediaType } = uploadedFileMeta;

wixData.query("SomeDB", "00001")

.then(result => {

result.gallery.push({

src: fileUrl,

type: mediaType,

});

return wixData.save("SomeDB", result);

});

```