How Can I Understand this File (tmp.3.w3kLqg) is Necessary ?

Question

I Found This File (tmp.3.w3kLqg) With Omnidisksweeper in this directory <Private/var/tmp>, It's Size is 4.5Gb , Can I Delete This File ? how can i understand it's necessary ?

Answer 1

Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the page that opens.
Drag or copy — do not type — the following line into the Terminal window, then press return:
sudo lsof /var/tmp/tmp.3.w3kLqg
You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. You don't need to post the warning. If you don’t have a login password, you’ll need to set one before you can run the command.
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
Post any lines of output that appear below what you entered — the text, please, not a screenshot.
If any personal information appears in the output, edit before posting, but don’t remove the context.