Tc-aran-001.7z.004 -

The .7z indicates it is a 7-Zip archive, and the .004 indicates it is the fourth part .

Right-click on the first file (the one ending in .001 ). Tc-Aran-001.7z.004

When large datasets, software, or media collections are archived using , they are often split into smaller chunks. or media collections are archived using