I have a variable that defines the server storage and then a line of code that looks for a folder in that server storage. The error is: Tools is not a valid member of ServerStorage "ServerStorage" When I do have a folder called "Tools"
local ServerStor = game:GetService("ServerStorage")
ServerStor.Tools:WaitForChild(player.Pickaxe.Value)

2 comments
Yup, clients can't access ServerStorage so always keep that in mind.
to add on to that, clients can't see the ServerScriptService either.