Saving values in a folder with a datastore?

Alright. So when you do the loop each time it saves the value to a key. If you want it to get every single banned person you're going to have to save it in one value and split it once the game is loaded.

local rs = game:GetService("ReplicatedStorage")
local DataStoreService = game:GetService("DataStoreService")
local DataStore = DataStoreService:GetDataStore("AdminDatastore")

repeat wait() until game.ReplicatedStorage.AdminEvents.Banned
	local one = DataStore:GetAsync("bans")
    local two = string.split(one, "|")
    for i,v in pairs(two) do
        local three = Instance.new("StringValue")
        local four = string.split(v, ",")
        three.Name = four[1]
        three.Value = four[2]
        three.Parent = game.ReplicatedStorage.AdminEvents.Banned
    end

game:BindToClose(function()
    local update
    for i,v in pairs(game.ReplicatedStorage.AdminEvents.Banned:GetChildren()) do
        if update == nil then
            update = v.Name..","..v.Value
    	else
            update = update.."|"..v.Name..","..v.Value
    end
    end
    DataStore:SetAsync("bans",update)

end)

Tested! It works now.