diff --git a/api/cloud-resources/v1beta1/gcpnfsvolume_types.go b/api/cloud-resources/v1beta1/gcpnfsvolume_types.go
index b13e63545..bc864ad98 100644
--- a/api/cloud-resources/v1beta1/gcpnfsvolume_types.go
+++ b/api/cloud-resources/v1beta1/gcpnfsvolume_types.go
@@ -68,8 +68,10 @@ const (
 // +kubebuilder:validation:XValidation:rule=(self.tier != "ZONAL" || self.tier == "ZONAL" && size(self.fileShareName) <= 64), message="ZONAL tier fileShareName length must be 64 or less characters"
 // +kubebuilder:validation:XValidation:rule=(self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && self.capacityGb >= 2560 && self.capacityGb <= 65400), message="BASIC_SSD tier capacityGb must be between 2560 and 65400"
 // +kubebuilder:validation:XValidation:rule=(self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && size(self.fileShareName) <= 16), message="BASIC_SSD tier fileShareName length must be 16 or less characters"
+// +kubebuilder:validation:XValidation:rule=(self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && self.capacityGb >= oldSelf.capacityGb), message="BASIC_SSD tier capacityGb cannot be reduced"
 // +kubebuilder:validation:XValidation:rule=(self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && self.capacityGb >= 1024 && self.capacityGb <= 65400), message="BASIC_HDD tier capacityGb must be between 1024 and 65400"
 // +kubebuilder:validation:XValidation:rule=(self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && size(self.fileShareName) <= 16), message="BASIC_HDD tier fileShareName length must be 16 or less characters"
+// +kubebuilder:validation:XValidation:rule=(self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && self.capacityGb >= oldSelf.capacityGb), message="BASIC_HDD tier capacityGb cannot be reduced"
 type GcpNfsVolumeSpec struct {
 	// +optional
 	// +kubebuilder:validation:XValidation:rule=(self == oldSelf), message="IpRange is immutable."
diff --git a/config/crd/bases/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml b/config/crd/bases/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml
index 495b62d4d..76d3c1497 100644
--- a/config/crd/bases/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml
+++ b/config/crd/bases/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml
@@ -4,7 +4,7 @@ kind: CustomResourceDefinition
 metadata:
   annotations:
     controller-gen.kubebuilder.io/version: v0.16.5
-    cloud-resources.kyma-project.io/version: v0.0.7
+    cloud-resources.kyma-project.io/version: v0.0.8
   name: gcpnfsvolumes.cloud-resources.kyma-project.io
 spec:
   group: cloud-resources.kyma-project.io
@@ -153,10 +153,14 @@ spec:
                   rule: (self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && self.capacityGb >= 2560 && self.capacityGb <= 65400)
                 - message: BASIC_SSD tier fileShareName length must be 16 or less characters
                   rule: (self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && size(self.fileShareName) <= 16)
+                - message: BASIC_SSD tier capacityGb cannot be reduced
+                  rule: (self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && self.capacityGb >= oldSelf.capacityGb)
                 - message: BASIC_HDD tier capacityGb must be between 1024 and 65400
                   rule: (self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && self.capacityGb >= 1024 && self.capacityGb <= 65400)
                 - message: BASIC_HDD tier fileShareName length must be 16 or less characters
                   rule: (self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && size(self.fileShareName) <= 16)
+                - message: BASIC_HDD tier capacityGb cannot be reduced
+                  rule: (self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && self.capacityGb >= oldSelf.capacityGb)
             status:
               description: GcpNfsVolumeStatus defines the observed state of GcpNfsVolume
               properties:
diff --git a/config/dist/skr/crd/bases/providers/gcp/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml b/config/dist/skr/crd/bases/providers/gcp/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml
index 495b62d4d..76d3c1497 100644
--- a/config/dist/skr/crd/bases/providers/gcp/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml
+++ b/config/dist/skr/crd/bases/providers/gcp/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml
@@ -4,7 +4,7 @@ kind: CustomResourceDefinition
 metadata:
   annotations:
     controller-gen.kubebuilder.io/version: v0.16.5
-    cloud-resources.kyma-project.io/version: v0.0.7
+    cloud-resources.kyma-project.io/version: v0.0.8
   name: gcpnfsvolumes.cloud-resources.kyma-project.io
 spec:
   group: cloud-resources.kyma-project.io
@@ -153,10 +153,14 @@ spec:
                   rule: (self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && self.capacityGb >= 2560 && self.capacityGb <= 65400)
                 - message: BASIC_SSD tier fileShareName length must be 16 or less characters
                   rule: (self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && size(self.fileShareName) <= 16)
+                - message: BASIC_SSD tier capacityGb cannot be reduced
+                  rule: (self.tier != "BASIC_SSD" || self.tier == "BASIC_SSD" && self.capacityGb >= oldSelf.capacityGb)
                 - message: BASIC_HDD tier capacityGb must be between 1024 and 65400
                   rule: (self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && self.capacityGb >= 1024 && self.capacityGb <= 65400)
                 - message: BASIC_HDD tier fileShareName length must be 16 or less characters
                   rule: (self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && size(self.fileShareName) <= 16)
+                - message: BASIC_HDD tier capacityGb cannot be reduced
+                  rule: (self.tier != "BASIC_HDD" || self.tier == "BASIC_HDD" && self.capacityGb >= oldSelf.capacityGb)
             status:
               description: GcpNfsVolumeStatus defines the observed state of GcpNfsVolume
               properties:
diff --git a/config/patchAfterMakeManifests.sh b/config/patchAfterMakeManifests.sh
index a34c44353..b0f75dbc7 100755
--- a/config/patchAfterMakeManifests.sh
+++ b/config/patchAfterMakeManifests.sh
@@ -9,7 +9,7 @@ yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.1.1
 yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.0.3"' $SCRIPT_DIR/crd/bases/cloud-resources.kyma-project.io_awsnfsvolumes.yaml
 yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.0.3"' $SCRIPT_DIR/crd/bases/cloud-resources.kyma-project.io_awsnfsvolumebackups.yaml
 yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.0.16"' $SCRIPT_DIR/crd/bases/cloud-resources.kyma-project.io_awsredisinstances.yaml
-yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.0.7"' $SCRIPT_DIR/crd/bases/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml
+yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.0.8"' $SCRIPT_DIR/crd/bases/cloud-resources.kyma-project.io_gcpnfsvolumes.yaml
 yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.0.18"' $SCRIPT_DIR/crd/bases/cloud-resources.kyma-project.io_gcpredisinstances.yaml
 yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.0.2"' $SCRIPT_DIR/crd/bases/cloud-resources.kyma-project.io_azurevpcpeerings.yaml
 yq -i '.metadata.annotations."cloud-resources.kyma-project.io/version" = "v0.0.54"' $SCRIPT_DIR/crd/bases/cloud-resources.kyma-project.io_azureredisinstances.yaml
diff --git a/internal/api-tests/skr_gcpnfsvolume_test.go b/internal/api-tests/skr_gcpnfsvolume_test.go
index e95d739c2..bdd3b6472 100644
--- a/internal/api-tests/skr_gcpnfsvolume_test.go
+++ b/internal/api-tests/skr_gcpnfsvolume_test.go
@@ -77,6 +77,20 @@ var _ = Describe("Feature: SKR GcpNfsVolume", Ordered, func() {
 			newTestGcpNfsVolumeBuilder().WithTier(tier).WithCapacityGb(1024).WithFileShareName(fileShareName65char),
 			fmt.Sprintf("%s tier fileShareName length must be 64 or less characters", tier),
 		)
+		canChangeSkr(
+			fmt.Sprintf("GcpNfsVolume %s tier instance capacity can be increased", tier),
+			newTestGcpNfsVolumeBuilder().WithTier(tier).WithCapacityGb(1024).WithValidFileShareName(),
+			func(b Builder[*cloudresourcesv1beta1.GcpNfsVolume]) {
+				b.(*testGcpNfsVolumeBuilder).WithCapacityGb(1280)
+			},
+		)
+		canChangeSkr(
+			fmt.Sprintf("GcpNfsVolume %s tier instance capacity can be reduced", tier),
+			newTestGcpNfsVolumeBuilder().WithTier(tier).WithCapacityGb(1280).WithValidFileShareName(),
+			func(b Builder[*cloudresourcesv1beta1.GcpNfsVolume]) {
+				b.(*testGcpNfsVolumeBuilder).WithCapacityGb(1024)
+			},
+		)
 	}
 
 	for _, validCapacity := range []int{2560, 2561, 65399, 65400} {
@@ -97,6 +111,21 @@ var _ = Describe("Feature: SKR GcpNfsVolume", Ordered, func() {
 		newTestGcpNfsVolumeBuilder().WithTier(cloudresourcesv1beta1.BASIC_SSD).WithCapacityGb(1024).WithFileShareName(fileShareName17char),
 		"BASIC_SSD tier fileShareName length must be 16 or less characters",
 	)
+	canChangeSkr(
+		"GcpNfsVolume BASIC_SSD tier instance capacity can be increased",
+		newTestGcpNfsVolumeBuilder().WithTier(cloudresourcesv1beta1.BASIC_SSD).WithCapacityGb(2560).WithValidFileShareName(),
+		func(b Builder[*cloudresourcesv1beta1.GcpNfsVolume]) {
+			b.(*testGcpNfsVolumeBuilder).WithCapacityGb(2561)
+		},
+	)
+	canNotChangeSkr(
+		"GcpNfsVolume BASIC_SSD tier instance capacity can not be reduced",
+		newTestGcpNfsVolumeBuilder().WithTier(cloudresourcesv1beta1.BASIC_SSD).WithCapacityGb(2561).WithValidFileShareName(),
+		func(b Builder[*cloudresourcesv1beta1.GcpNfsVolume]) {
+			b.(*testGcpNfsVolumeBuilder).WithCapacityGb(2560)
+		},
+		"BASIC_SSD tier capacityGb cannot be reduced",
+	)
 
 	for _, validCapacity := range []int{1024, 1025, 65399, 65400} {
 		canCreateSkr(
@@ -116,6 +145,21 @@ var _ = Describe("Feature: SKR GcpNfsVolume", Ordered, func() {
 		newTestGcpNfsVolumeBuilder().WithTier(cloudresourcesv1beta1.BASIC_HDD).WithCapacityGb(1024).WithFileShareName(fileShareName17char),
 		"BASIC_HDD tier fileShareName length must be 16 or less characters",
 	)
+	canChangeSkr(
+		"GcpNfsVolume BASIC_HDD tier instance capacity can be increased",
+		newTestGcpNfsVolumeBuilder().WithTier(cloudresourcesv1beta1.BASIC_HDD).WithCapacityGb(1024).WithValidFileShareName(),
+		func(b Builder[*cloudresourcesv1beta1.GcpNfsVolume]) {
+			b.(*testGcpNfsVolumeBuilder).WithCapacityGb(1025)
+		},
+	)
+	canNotChangeSkr(
+		"GcpNfsVolume BASIC_HDD tier instance capacity can not be reduced",
+		newTestGcpNfsVolumeBuilder().WithTier(cloudresourcesv1beta1.BASIC_HDD).WithCapacityGb(1025).WithValidFileShareName(),
+		func(b Builder[*cloudresourcesv1beta1.GcpNfsVolume]) {
+			b.(*testGcpNfsVolumeBuilder).WithCapacityGb(1024)
+		},
+		"BASIC_HDD tier capacityGb cannot be reduced",
+	)
 
 	for _, removedTier := range []string{"STANDARD", "PREMIUM", "HIGH_SCALE_SSD", "ENTERPRISE"} {
 		canNotCreateSkr(