Hello @S.Hillcenter
you can install locally in your PC SCP or TFTP server and upload the TSF file directly to your PC, then attach it to the TAC ticket. Here is a reference: How to Collect Tech Support File from a Log Collector. The KB is for log collector, but you can use the same commands for Firewalls as well. In the past when I had to get TSF from log collector, I recall memory to use WinSCP client on Windows machine that worked well.
Regarding direct upload to support portal, could you refer to this KB: How to Generate and Upload a Tech Support File Using the WebGUI and CLI? The <The TAC case number>@tacupload.paloaltonetworks.com:./ should match including leading zeros.
Kind Regards
Pavel
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