Why is it that when I create a part in ServerStorage, it doesn’t appear? Even when I create it in ReplicatedStorage, it still doesn’t show
Because parts, meshes and unions only appear when being in workspace.
Other than workspace, it will not be affected by roblox physics.
Why you need to create it there if it just as it says it are storage containers
ReplicatedStorage will be replicated to the client here you put modules that the client needs to access and remote event or assets (such as parts) what the client needs to access where the client is the player
ServerStorage will not be replicated to the client where you can store modules only the server have access to such as data modules you also can store assets (such as parts) there where the client may not have direct acces to
While you need to have assets visible you need to clone/move it to workspace from there
This also applies to scripts in server storage.
Serverstorage is STRICTLY used for things the player isnt meant to see or use without having to hide it.
also the reason you cant or never will be able to see it is cuz its on the server and no data of anything in there gets sent to the client.
Thus nothing to get, nothing to render, nothing to see.