Hi, I have the following...
LRTL 5
Windows 10
Lightroom Classic release 8

I have a large timelapse and I have the project files on a extremely large drive but the C drive fills up and the export process halts. I'm assuming there is a temp folder on the C drive that is being used for the export process. I have checked all the settings both in LRTL and Lightroom and they are all configured to the extremely large drive.

Can someone tell me why the C drive is being filled up and where the setting is to change it?

thanks

When rendering, LRTimelapse uses the default temp folder on Windows/Mac and only copies the file to the final destination. If you want to change the location of the temp file you can do that in the OS settings.