Solution?

modules/resource_group_storage/main.tf

@@ -0,0 +1,14 @@
+#define the resources
+
+resource "azurerm_resource_group" "example" {
+  name     = var.resource_group_name
+  location = var.location
+}
+
+resource "azurerm_storage_account" "example" {
+  name                     = var.storage_account_name
+  resource_group_name      = azurerm_resource_group.example.name
+  location                 = azurerm_resource_group.example.location
+  account_tier             = "Standard"
+  account_replication_type = "LRS"
+}

modules/resource_group_storage/outputs.tf

@@ -0,0 +1,9 @@
+#define the outputs
+
+output "resource_group_id" {
+  value = azurerm_resource_group.example.id
+}
+
+output "storage_account_id" {
+  value = azurerm_storage_account.example.id
+}

modules/resource_group_storage/variables.tf

@@ -0,0 +1,16 @@
+#define the variables
+
+variable "resource_group_name" {
+  description = "The name of the resource group"
+  default     = "example-resources"
+}
+
+variable "storage_account_name" {
+  description = "The name of the storage account"
+  default     = "examplestorageaccount"
+}
+
+variable "location" {
+  description = "The location for all resources."
+  default     = "East US"
+}