Can the tmp folder be deleted without harm?

My TMP folder takes a lot of space.
What is the function of the Piwik tmp folder (…/piwik/tmp/) and what is the fuction of the cache folder (…/piwik/tmp/cache).
Do we need the files in this folder or is it just a dump ?
Under which circumstances these files can be deleted?
What information is lost after deleteing these files?
When are the files in these folders created ?
When are the files in these folders needed?

Many thanks in advance for answering.
J.P.Peters Netherlands

how big is your tmp/ folder?

It’s safe to delete the files inside

The two largest folders are:

size: 19.95 Mb

size: 2.0 Mb


you can safely delete them,