Excellent your answer quality! Happen when you put a new ped, you change several sub-folders of Mod: Maybe, mppatches and patchday3ng and patchday6ng and x64v.
Unfortunately, a ped isn't in a single folder. It would be much easier. 
If I understand you in the right way, the idea would be to make a backup of each subfolder that was changed and not a 100% backup of Mod "Master" Folder.
Good idea!
Very, very thanks JonaQ
Yesterday I had a serious problem with Open IV, when I tried to open x64v folder, Open IV showed me a "corrupt file" poster. OMG!
I didn't know how to fix the issue, ending with uninstall GTA V and lost all peds were installed.
My question has two parts:
1.- Can a make a backup of Mod Folder? for example, daily, or each time I add a new ped? With any special program, or "copy and paste"?
2 .- If I'll have "corrupt folder" again, may I delete that corrupt folder, but how can I do to open Open IV and make it recognize all the content of the backup file?
Thanks friends.
NLB