How about I pirate paid mods and duplicate the files for my friends to use?
Why do you want to keep a copy of these files?
In the future, I want to come back to these mods.
I understand you, but it is wrong and illegal to pirate software. You should pay money for it and then you can share copies. Otherwise you are just being a thief.
I've worked hard for my money.
You have worked hard for your money so you don't want to lose your job over something like this. You shouldn't pirate software that you are capable of buying. There are many consequences for doing things like that.