Run out of space

How can I change the buffer location from default system folder to another drive?

because I don’t have enough disk space for the temp/buffer file and syncing 80+ computer takes up more than 4GB (my current free disk space) will cause syncthing hanging as I run out of disk space.

Please advise.

-home option. You might need to copy the existing config and db there.

Also, it’s documented, hence suggest you skim through the docs: