diff --git a/mongodbatlas/project_settings.go b/mongodbatlas/project_settings.go
index a95c89c5e..12a4b5a02 100644
--- a/mongodbatlas/project_settings.go
+++ b/mongodbatlas/project_settings.go
@@ -25,6 +25,7 @@ const projectSettingsBasePath = projectBasePath + "/%s/settings"
 type ProjectSettings struct {
 	IsCollectDatabaseSpecificsStatisticsEnabled *bool `json:"isCollectDatabaseSpecificsStatisticsEnabled,omitempty"`
 	IsDataExplorerEnabled                       *bool `json:"isDataExplorerEnabled,omitempty"`
+	IsExtendedStorageSizesEnabled               *bool `json:"isExtendedStorageSizesEnabled,omitempty"`
 	IsPerformanceAdvisorEnabled                 *bool `json:"isPerformanceAdvisorEnabled,omitempty"`
 	IsRealtimePerformancePanelEnabled           *bool `json:"isRealtimePerformancePanelEnabled,omitempty"`
 	IsSchemaAdvisorEnabled                      *bool `json:"isSchemaAdvisorEnabled,omitempty"`
diff --git a/mongodbatlas/project_settings_test.go b/mongodbatlas/project_settings_test.go
index 972004133..fe5381e34 100644
--- a/mongodbatlas/project_settings_test.go
+++ b/mongodbatlas/project_settings_test.go
@@ -29,8 +29,9 @@ func TestProjects_GetProjectSettings(t *testing.T) {
 	mux.HandleFunc(fmt.Sprintf("/api/atlas/v1.0/groups/%s/settings", groupID), func(w http.ResponseWriter, r *http.Request) {
 		testMethod(t, r, http.MethodGet)
 		_, _ = fmt.Fprint(w, `{
-               "isCollectDatabaseSpecificsStatisticsEnabled": true,
+			   "isCollectDatabaseSpecificsStatisticsEnabled": true,
 			   "isDataExplorerEnabled": true,
+			   "isExtendedStorageSizesEnabled": true,
 			   "isPerformanceAdvisorEnabled": true,
 			   "isRealtimePerformancePanelEnabled": true,
 			   "isSchemaAdvisorEnabled": true
@@ -45,6 +46,7 @@ func TestProjects_GetProjectSettings(t *testing.T) {
 	expected := &ProjectSettings{
 		IsCollectDatabaseSpecificsStatisticsEnabled: pointer(true),
 		IsDataExplorerEnabled:                       pointer(true),
+		IsExtendedStorageSizesEnabled:               pointer(true),
 		IsPerformanceAdvisorEnabled:                 pointer(true),
 		IsRealtimePerformancePanelEnabled:           pointer(true),
 		IsSchemaAdvisorEnabled:                      pointer(true),
@@ -62,8 +64,9 @@ func TestProjects_UpdateProjectSettings(t *testing.T) {
 	mux.HandleFunc(fmt.Sprintf("/api/atlas/v1.0/groups/%s/settings", groupID), func(w http.ResponseWriter, r *http.Request) {
 		testMethod(t, r, http.MethodPatch)
 		_, _ = fmt.Fprint(w, `{
-               "isCollectDatabaseSpecificsStatisticsEnabled": true,
+			   "isCollectDatabaseSpecificsStatisticsEnabled": true,
 			   "isDataExplorerEnabled": true,
+			   "isExtendedStorageSizesEnabled": true,
 			   "isPerformanceAdvisorEnabled": true,
 			   "isRealtimePerformancePanelEnabled": true,
 			   "isSchemaAdvisorEnabled": true
@@ -73,6 +76,7 @@ func TestProjects_UpdateProjectSettings(t *testing.T) {
 	body := &ProjectSettings{
 		IsCollectDatabaseSpecificsStatisticsEnabled: pointer(true),
 		IsDataExplorerEnabled:                       pointer(true),
+		IsExtendedStorageSizesEnabled:               pointer(true),
 		IsPerformanceAdvisorEnabled:                 pointer(true),
 		IsRealtimePerformancePanelEnabled:           pointer(true),
 		IsSchemaAdvisorEnabled:                      pointer(true),
@@ -86,6 +90,7 @@ func TestProjects_UpdateProjectSettings(t *testing.T) {
 	expected := &ProjectSettings{
 		IsCollectDatabaseSpecificsStatisticsEnabled: pointer(true),
 		IsDataExplorerEnabled:                       pointer(true),
+		IsExtendedStorageSizesEnabled:               pointer(true),
 		IsPerformanceAdvisorEnabled:                 pointer(true),
 		IsRealtimePerformancePanelEnabled:           pointer(true),
 		IsSchemaAdvisorEnabled:                      pointer(true),