Right-click on the .001 file specifically. The software will automatically detect the other parts in the folder and merge them into a single usable folder. Final Verdict
If you’ve been scouring the forums for the latest armor mods, you’ve likely stumbled upon a massive multi-part archive titled tbm-hun-leo-1.7z.001 . For those curious about what's under the hood of this specific Hungarian Leopard pack,
Do you have the (.002, .003) in the same folder to attempt a full extraction?