Written files are being deleted automatically

Hi, I created AWS Lambda using Jets gem.
This function writes the files in /tmp folder.
But I have noticed that files are being deleted automatically.
I want to keep that files at least a day(24 hrs).

This is a config of application and Job class config.
Maybe this issue related is timeout config, but I am not sure.

Application config
config.function.timeout = 30 # defaults to 30

Job classes config
class ApplicationJob < Jets::Job::Base
class_timeout 60

Can I prevent deleting automatically?
Thank you.