Thread:NathanMa17-fduser/@comment-4826222-20191227100335/@comment-4826222-20191227120235

When uploading a file, you can type into "Destination filename" what the files should be named or, to be more precise, under which file name it should be uploaded to the wiki. You can read more about it at Help:Uploading files. I would always recommend to use Special:Upload when uploading a file in general.

EDIT: Once you've uploaded a file, there's no way for you to rename it. That's something only admins and content moderators can do.