/tmp/ folder out of space

Folks…I just rebuilt my Duplicati server. The new system is a Raspberry Pi 4B with 4 GB. The SDCard with the OS (TRIXIE) is 32 GB and also attached is a128 GB USB drive. It seemed to be working correctly,even with the warning below:
The temporary folder '/tmp/' has limited free space (1.853 GiB). It is recommended to have at least 10 times the volume size (200.000 GiB) available for optimal operation....

Today I got an error that said the /tmp/ folder was out of space, so now I need to address the issue. I should have plenty of space on the USB drive. After Googling the issue ti appears that I have to use this advance option, –tempdir= to specify a new /tmp/ location. It indicates that it needs to be added to the "Step 5 (Options), Advanced options, Add advanced option" and add the new location for each backup.

Is it possible to add this once so it affects all my backups?

Thanks…RDK