You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. Creating Encrypted ZIP files with 7-Zip - DCU
Since the filename 1_20150831232.7z appears to be a specific, likely auto-generated archive from August 31, 2015, a "proper post" depends on where you are sharing it and what the contents are. 1_20150831232.7z
I’ve uploaded the archive 1_20150831232.7z . This file holds the historical records for [Department/Task] corresponding to August 2015. Download the file. Right-click and use 7-Zip to "Extract files...". You can use 7-Zip on any computer, including
Use this for sharing legacy records or backup data with colleagues. Legacy Data Backup - 2015-08-31 likely auto-generated archive from August 31
Option 1: Technical/Development Community (e.g., GitHub, Stack Overflow)