diff --git a/AGENTS.md b/AGENTS.md
index 65486e6..2a2ec4e 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -1000,7 +1000,7 @@ Supported MVP placement values:
 | `aws-ap-northeast-1` | AWS | Tokyo |
 | `aws-ap-southeast-1` | AWS | Singapore |
 | `alicloud-ap-southeast-1` | Alibaba Cloud | Singapore |
-| `gcp-us-east-1` | Google Cloud | South Carolina |
+| `gcp-us-east1` | Google Cloud | South Carolina |
 
 The prefix before the first `-` is the cloud provider selector. `aws` maps to
 internal provider `aws`; `alicloud` maps to internal provider
diff --git a/README.md b/README.md
index b028fc3..f65cfc8 100644
--- a/README.md
+++ b/README.md
@@ -102,8 +102,8 @@ Automation should move to `TI_*` and `TIDB_CLOUD_*` environment variables. The v
 ### Configure
 
 - Authentication: a TiDB Cloud Public Key and a Private Key from the [TiDB Cloud API Keys](https://tidbcloud.com/org-settings/api-keys) console. When either credential is missing, `ti` links to this page in its authentication error before suggesting `ti configure` or the corresponding environment variables.
-- Default region: one of aws-us-east-1, aws-us-west-2, aws-eu-central-1, aws-ap-northeast-1, aws-ap-southeast-1, alicloud-ap-southeast-1, or gcp-us-east-1.
-    - Regions supporting TiDB Cloud Filesystem: aws-us-east-1, aws-ap-southeast-1, aws-us-west-2, alicloud-ap-southeast-1, or gcp-us-east-1. These endpoints are built into `ti`; endpoint resolution does not download a Drive9 region manifest.
+- Default region: one of aws-us-east-1, aws-us-west-2, aws-eu-central-1, aws-ap-northeast-1, aws-ap-southeast-1, alicloud-ap-southeast-1, or gcp-us-east1.
+    - Regions supporting TiDB Cloud Filesystem: aws-us-east-1, aws-ap-southeast-1, aws-us-west-2, alicloud-ap-southeast-1, or gcp-us-east1. These endpoints are built into `ti`; endpoint resolution does not download a Drive9 region manifest.
     - Regions supporting TiDB Cloud Starter: aws-us-east-1, aws-us-west-2, aws-eu-central-1, aws-ap-northeast-1, aws-ap-southeast-1, or alicloud-ap-southeast-1.
 
 Set up a default profile with one command:
diff --git a/docs/priciples.md b/docs/priciples.md
index de24a9a..e7ec695 100644
--- a/docs/priciples.md
+++ b/docs/priciples.md
@@ -77,7 +77,7 @@ Supported TiDB Cloud Starter placement values are:
 | `aws-ap-southeast-1` | AWS | Singapore |
 | `alicloud-ap-southeast-1` | Alibaba Cloud | Singapore |
 
-`aws` maps to the internal provider `aws`; `alicloud` maps to `alibaba_cloud`; `gcp` maps to `gcp`. TiDB Cloud Filesystem supports `aws-us-east-1`, `aws-ap-southeast-1`, `aws-us-west-2`, `alicloud-ap-southeast-1`, and `gcp-us-east-1` through endpoint mappings built into `ti`.
+`aws` maps to the internal provider `aws`; `alicloud` maps to `alibaba_cloud`; `gcp` maps to `gcp`. TiDB Cloud Filesystem supports `aws-us-east-1`, `aws-ap-southeast-1`, `aws-us-west-2`, `alicloud-ap-southeast-1`, and `gcp-us-east1` through endpoint mappings built into `ti`.
 
 ## TiDB Cloud Authentication
 
diff --git a/e2e/installer_test.go b/e2e/installer_test.go
index a9e94f5..476677e 100644
--- a/e2e/installer_test.go
+++ b/e2e/installer_test.go
@@ -208,7 +208,7 @@ fi
 			t.Fatalf("installer did not validate companion command surface %q; calls:\n%s", want, companionCallData)
 		}
 	}
-	for _, regionCode := range []string{"aws-us-east-1", "aws-ap-southeast-1", "aws-us-west-2", "alicloud-ap-southeast-1", "gcp-us-east-1"} {
+	for _, regionCode := range []string{"aws-us-east-1", "aws-ap-southeast-1", "aws-us-west-2", "alicloud-ap-southeast-1", "gcp-us-east1"} {
 		if !strings.Contains(string(output), regionCode) {
 			t.Fatalf("installer did not list ti fs region %q:\n%s", regionCode, output)
 		}
@@ -294,7 +294,7 @@ func TestInstallersUseProductOwnedFSRegionsAndHideCompanionPath(t *testing.T) {
 		if strings.Contains(content, "ti fs companion installed to") {
 			t.Fatalf("%s still reports the companion installation path", path)
 		}
-		for _, regionCode := range []string{"aws-us-east-1", "aws-ap-southeast-1", "aws-us-west-2", "alicloud-ap-southeast-1", "gcp-us-east-1"} {
+		for _, regionCode := range []string{"aws-us-east-1", "aws-ap-southeast-1", "aws-us-west-2", "alicloud-ap-southeast-1", "gcp-us-east1"} {
 			if !strings.Contains(content, regionCode) {
 				t.Fatalf("%s does not list ti fs region %q", path, regionCode)
 			}
diff --git a/e2e/live_test.go b/e2e/live_test.go
index e428878..ea52519 100644
--- a/e2e/live_test.go
+++ b/e2e/live_test.go
@@ -730,7 +730,8 @@ func resolveLiveFSResourceByID(t *testing.T, profile *config.Profile, fileSystem
 func isLiveFSQuotaError(message string) bool {
 	message = strings.ToLower(message)
 	return strings.Contains(message, "maximum number of free clusters") ||
-		strings.Contains(message, "quota or capacity limit")
+		strings.Contains(message, "quota or capacity limit") ||
+		strings.Contains(message, "filesystem limit reached")
 }
 
 func TestLiveFSDataPlaneLifecycle(t *testing.T) {
diff --git a/internal/api/endpoints/endpoints.go b/internal/api/endpoints/endpoints.go
index 18430ca..b184727 100644
--- a/internal/api/endpoints/endpoints.go
+++ b/internal/api/endpoints/endpoints.go
@@ -245,7 +245,7 @@ func builtInFSRegionManifest() *FSRegionManifest {
 			{RegionCode: "aws-ap-southeast-1", Mode: DefaultFSMode, ServerURL: "https://aws-ap-southeast-1.drive9.ai", CloudProvider: "aws", TiDBRegion: "ap-southeast-1"},
 			{RegionCode: "aws-us-west-2", Mode: DefaultFSMode, ServerURL: "https://aws-us-west-2.drive9.ai", CloudProvider: "aws", TiDBRegion: "us-west-2"},
 			{RegionCode: "alicloud-ap-southeast-1", Mode: DefaultFSMode, ServerURL: "https://alicloud-ap-southeast-1.drive9.ai", CloudProvider: "alicloud", TiDBRegion: "ap-southeast-1"},
-			{RegionCode: "gcp-us-east-1", Mode: DefaultFSMode, ServerURL: "https://gcp-us-east1.drive9.ai", CloudProvider: "gcp", TiDBRegion: "us-east-1"},
+			{RegionCode: "gcp-us-east1", Mode: DefaultFSMode, ServerURL: "https://gcp-us-east1.drive9.ai", CloudProvider: "gcp", TiDBRegion: "us-east1"},
 		},
 	}
 }
diff --git a/internal/api/endpoints/endpoints_test.go b/internal/api/endpoints/endpoints_test.go
index fdf9a41..159d268 100644
--- a/internal/api/endpoints/endpoints_test.go
+++ b/internal/api/endpoints/endpoints_test.go
@@ -159,7 +159,7 @@ func TestResolveFSUsesBuiltInRegionMapping(t *testing.T) {
 		{name: "AWS Singapore", provider: region.ProviderAWS, regionCode: "ap-southeast-1", baseURL: "https://aws-ap-southeast-1.drive9.ai", regionName: "aws-ap-southeast-1"},
 		{name: "AWS Oregon", provider: region.ProviderAWS, regionCode: "us-west-2", baseURL: "https://aws-us-west-2.drive9.ai", regionName: "aws-us-west-2"},
 		{name: "Alibaba Cloud Singapore", provider: region.ProviderAlibabaCloud, regionCode: "ap-southeast-1", baseURL: "https://alicloud-ap-southeast-1.drive9.ai", regionName: "alicloud-ap-southeast-1"},
-		{name: "GCP South Carolina", provider: region.ProviderGCP, regionCode: "us-east-1", baseURL: "https://gcp-us-east1.drive9.ai", regionName: "gcp-us-east-1"},
+		{name: "GCP South Carolina", provider: region.ProviderGCP, regionCode: "us-east1", baseURL: "https://gcp-us-east1.drive9.ai", regionName: "gcp-us-east1"},
 	}
 	resolver := NewResolver()
 	if resolver.FSManifestURL != "" {
diff --git a/internal/config/region/region.go b/internal/config/region/region.go
index c38075e..61b3beb 100644
--- a/internal/config/region/region.go
+++ b/internal/config/region/region.go
@@ -43,7 +43,7 @@ var supported = map[string][]Region{
 		{Code: "ap-southeast-1", Label: "Singapore"},
 	},
 	ProviderGCP: {
-		{Code: "us-east-1", Label: "South Carolina"},
+		{Code: "us-east1", Label: "South Carolina"},
 	},
 }
 
diff --git a/internal/config/region/region_test.go b/internal/config/region/region_test.go
index bc5be2f..50208dc 100644
--- a/internal/config/region/region_test.go
+++ b/internal/config/region/region_test.go
@@ -13,7 +13,7 @@ func TestValidateSupportedProviderRegions(t *testing.T) {
 		{ProviderAWS, "ap-northeast-1"},
 		{ProviderAWS, "ap-southeast-1"},
 		{ProviderAlibabaCloud, "ap-southeast-1"},
-		{ProviderGCP, "us-east-1"},
+		{ProviderGCP, "us-east1"},
 	}
 
 	for _, tt := range tests {
@@ -55,7 +55,7 @@ func TestParsePlacementCode(t *testing.T) {
 		{"aws-ap-southeast-1", "aws-ap-southeast-1", ProviderAWS, "ap-southeast-1"},
 		{"alicloud-ap-southeast-1", "alicloud-ap-southeast-1", ProviderAlibabaCloud, "ap-southeast-1"},
 		{"ali-ap-southeast-1", "alicloud-ap-southeast-1", ProviderAlibabaCloud, "ap-southeast-1"},
-		{"gcp-us-east-1", "gcp-us-east-1", ProviderGCP, "us-east-1"},
+		{"gcp-us-east1", "gcp-us-east1", ProviderGCP, "us-east1"},
 	}
 
 	for _, tt := range tests {
@@ -72,7 +72,7 @@ func TestParsePlacementCode(t *testing.T) {
 }
 
 func TestParsePlacementCodeRejectsUnsupportedValues(t *testing.T) {
-	for _, code := range []string{"us-east-1", "ali-us-east-1", "gcp-us-east1"} {
+	for _, code := range []string{"us-east-1", "ali-us-east-1", "gcp-us-east-1"} {
 		t.Run(code, func(t *testing.T) {
 			if _, err := ParsePlacementCode(code); err == nil {
 				t.Fatal("expected placement code to be rejected")
diff --git a/internal/telemetrybackend/event.go b/internal/telemetrybackend/event.go
index af305ea..99a9743 100644
--- a/internal/telemetrybackend/event.go
+++ b/internal/telemetrybackend/event.go
@@ -71,7 +71,7 @@ var allowedRegions = map[string]struct{}{
 	"aws-ap-southeast-1":      {},
 	"ali-ap-southeast-1":      {},
 	"alicloud-ap-southeast-1": {},
-	"gcp-us-east-1":           {},
+	"gcp-us-east1":            {},
 }
 
 var allowedOperatingSystems = map[string]struct{}{
diff --git a/internal/telemetrybackend/event_test.go b/internal/telemetrybackend/event_test.go
index e579264..58de5ea 100644
--- a/internal/telemetrybackend/event_test.go
+++ b/internal/telemetrybackend/event_test.go
@@ -29,7 +29,7 @@ func TestDecodeAndValidateBatchAcceptsGCPPlacement(t *testing.T) {
 	}
 	event := request["events"].([]any)[0].(map[string]any)
 	event["cloud_provider"] = "gcp"
-	event["region_code"] = "gcp-us-east-1"
+	event["region_code"] = "gcp-us-east1"
 	body, err := json.Marshal(request)
 	if err != nil {
 		t.Fatal(err)
@@ -38,7 +38,7 @@ func TestDecodeAndValidateBatchAcceptsGCPPlacement(t *testing.T) {
 	if err != nil {
 		t.Fatalf("gcp placement should be accepted: %v", err)
 	}
-	if len(events) != 1 || events[0].CloudProvider != "gcp" || events[0].RegionCode != "gcp-us-east-1" {
+	if len(events) != 1 || events[0].CloudProvider != "gcp" || events[0].RegionCode != "gcp-us-east1" {
 		t.Fatalf("unexpected gcp event: %#v", events)
 	}
 }
diff --git a/scripts/install.ps1 b/scripts/install.ps1
index 8188450..3374fef 100644
--- a/scripts/install.ps1
+++ b/scripts/install.ps1
@@ -116,7 +116,7 @@ function Print-Regions {
     Write-Output "    alicloud-ap-southeast-1"
     Write-Output ""
     Write-Output "  ti fs regions:"
-    Write-Output "    aws-us-east-1, aws-ap-southeast-1, aws-us-west-2, alicloud-ap-southeast-1, gcp-us-east-1"
+    Write-Output "    aws-us-east-1, aws-ap-southeast-1, aws-us-west-2, alicloud-ap-southeast-1, gcp-us-east1"
 }
 
 function Print-NextSteps {
diff --git a/scripts/install.sh b/scripts/install.sh
index 4fc6d6e..4930dbb 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -279,7 +279,7 @@ print_regions() {
   printf "    alicloud-ap-southeast-1\n"
   printf "\n"
   printf "  ${BOLD}ti fs regions:${RESET}\n"
-  printf "    aws-us-east-1, aws-ap-southeast-1, aws-us-west-2, alicloud-ap-southeast-1, gcp-us-east-1\n"
+  printf "    aws-us-east-1, aws-ap-southeast-1, aws-us-west-2, alicloud-ap-southeast-1, gcp-us-east1\n"
 }
 
 print_next_steps() {