diff --git a/.changelog/9794.txt b/.changelog/9794.txt
new file mode 100644
index 00000000000..6fc7726162f
--- /dev/null
+++ b/.changelog/9794.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+filestore: make source_backup field configurable
+```
diff --git a/google/services/filestore/resource_filestore_instance.go b/google/services/filestore/resource_filestore_instance.go
index 9b73332badb..057e0da7fef 100644
--- a/google/services/filestore/resource_filestore_instance.go
+++ b/google/services/filestore/resource_filestore_instance.go
@@ -138,7 +138,8 @@ for not allowing root access. The default is NO_ROOT_SQUASH. Default value: "NO_
 						},
 						"source_backup": {
 							Type:     schema.TypeString,
-							Computed: true,
+							Optional: true,
+							ForceNew: true,
 							Description: `The resource name of the backup, in the format
 projects/{projectId}/locations/{locationId}/backups/{backupId},
 that this file share has been restored from.`,
diff --git a/google/services/filestore/resource_filestore_restore_test.go b/google/services/filestore/resource_filestore_restore_test.go
new file mode 100644
index 00000000000..1131c05ed9a
--- /dev/null
+++ b/google/services/filestore/resource_filestore_restore_test.go
@@ -0,0 +1,87 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+package filestore_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+	"github.com/hashicorp/terraform-provider-google/google/acctest"
+)
+
+func TestAccFilestoreInstance_restore(t *testing.T) {
+	t.Parallel()
+
+	srcInstancetName := fmt.Sprintf("tf-fs-inst-source-%d", acctest.RandInt(t))
+	restoreInstanceName := fmt.Sprintf("tf-fs-inst-restored-%d", acctest.RandInt(t))
+	backupName := fmt.Sprintf("tf-fs-bkup-%d", acctest.RandInt(t))
+
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		CheckDestroy:             testAccCheckFilestoreInstanceDestroyProducer(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccFilestoreInstanceRestore_restore(srcInstancetName, restoreInstanceName, backupName),
+			},
+			{
+				ResourceName:            "google_filestore_instance.instance_source",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"location"},
+			},
+		},
+	})
+}
+
+func testAccFilestoreInstanceRestore_restore(srcInstancetName, restoreInstanceName, backupName string) string {
+	return fmt.Sprintf(`
+	resource "google_filestore_instance" "instance_source" {
+		name        = "%s"
+		location    = "us-central1-b"
+		tier        = "BASIC_HDD"
+		description = "An instance created during testing."
+	  
+		file_shares {
+		  capacity_gb = 1024
+		  name        = "volume1"
+		}
+	  
+		networks {
+		  network      = "default"
+		  modes        = ["MODE_IPV4"]
+		  connect_mode = "DIRECT_PEERING"
+		}
+	}
+
+	resource "google_filestore_instance" "instance_restored" {
+		name        = "%s"
+		location    = "us-central1-b"
+		tier        = "BASIC_HDD"
+		description = "An instance created during testing."
+	  
+		file_shares {
+		  capacity_gb = 1024
+		  name        = "volume1"
+		  source_backup = google_filestore_backup.backup.id
+		}
+	  
+		networks {
+		  network      = "default"
+		  modes        = ["MODE_IPV4"]
+		  connect_mode = "DIRECT_PEERING"
+		}
+	}
+	  
+	resource "google_filestore_backup" "backup" {
+		name        = "%s"
+		location    = "us-central1"
+		source_instance   = google_filestore_instance.instance_source.id
+		source_file_share = "volume1"
+	  
+		description = "This is a filestore backup for the test instance"
+	}
+	  
+	`, srcInstancetName, restoreInstanceName, backupName)
+}
diff --git a/website/docs/r/filestore_instance.html.markdown b/website/docs/r/filestore_instance.html.markdown
index 7353d8d43ee..27c3efb032c 100644
--- a/website/docs/r/filestore_instance.html.markdown
+++ b/website/docs/r/filestore_instance.html.markdown
@@ -167,7 +167,7 @@ The following arguments are supported:
   for the standard tier, or 2560 GiB for the premium tier.
 
 * `source_backup` -
-  (Output)
+  (Optional)
   The resource name of the backup, in the format
   projects/{projectId}/locations/{locationId}/backups/{backupId},
   that this file share has been restored from.