How on earth can i edit a product via FTP??

I find this upload process to be a bit of a nightmare… my product got accepted despite it not being uploaded properly (unsure how…) and with the 3gb limit, i had to ditch the prores to h.264. So now I am trying to replace the zip file and I get an error (ofc) but can’t find a way to select the file on the edit screen that I uploaded via FTP. The file is, however, on the new product upload page…

Can someone help me out?

To edit your already uploaded item you need to use a different ftp host.

Excellent, thanks !!