Noob asking for some help

[Rockstar xD]

Hello, guys! I'm getting back to doing my server after a long time. Little thing. Just for me and 3 more friends, hosted in my own home and I've some questions:

• What do I need to know to make my own folder data? (How does it works?)
  
• Which version of hexed does Hercules support?
  
• Where do I find a differ updated? (I tried NEMO, but it don't worked fine. Showed too many erros with hexeds 2016+)
  

My questions are about the client-side. Server-side I know/remember how to configure it.

I'm feeling really lost.

PS.: Sorry for my English.