Hello, Igor,
This can be done by uploading all files inside the folder using the multiple prop:
https://www.telerik.com/kendo-react-ui-develop/components/upload/api/UploadProps/
As for uploading the entire folder by selecting it, if you wish I can transfer this to an official feature request, and then based on the popularity we will plant it accordingly:
https://feedback.telerik.com/kendo-react-ui
Regards,
Stefan
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