Upload files in spiff esp32

Hi community…

I am working with platformio and esp32.
I am going to production…
I would like to use an external tool to upload the binary (fw image) but i would like to upload also files in the spiff (in platformio using build and upload file system image)
I am using a tool called esp32 wd download tool v3.6.5…


Do you know how to use it to upload files in spiff?

Thanks a lot

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