diff --git a/resources/css/app.css b/resources/css/app.css
index c963d109fe..f45494098d 100644
--- a/resources/css/app.css
+++ b/resources/css/app.css
@@ -2952,13 +2952,14 @@ input[type="search"]::-webkit-search-results-decoration {
     width: 100%;
 }
 
-.data-table-row.service-backup-table-grid {
-    background: var(--coollabs-base);
-    border-bottom: 1px solid var(--coollabs-fill);
+.data-table-header.service-backup-table-grid {
+    border-bottom: 0;
 }
 
-.data-table-row.service-backup-table-grid:last-child {
-    border-bottom: 0;
+/* Rows are reordered with CSS order, so dividers must not depend on DOM position. */
+.data-table-row.service-backup-table-grid {
+    background: var(--coollabs-base);
+    border-top: 1px solid var(--coollabs-fill);
 }
 
 .data-table-row.service-backup-table-grid:hover {
diff --git a/resources/views/livewire/project/application/backup/index.blade.php b/resources/views/livewire/project/application/backup/index.blade.php
index 7e89bbcd07..f842ce95d0 100644
--- a/resources/views/livewire/project/application/backup/index.blade.php
+++ b/resources/views/livewire/project/application/backup/index.blade.php
@@ -167,7 +167,7 @@
                 </div>
 
                 @if ($backups->isNotEmpty())
-                    <div class="data-table w-full overflow-x-auto" x-show="filteredBackups.length > 0">
+                    <div class="data-table flex w-full flex-col overflow-x-auto" x-show="filteredBackups.length > 0">
                         <div class="data-table-header backup-table-grid">
                             <span>Target</span>
                             <span>Type</span>
diff --git a/resources/views/livewire/project/service/volume-backup/index.blade.php b/resources/views/livewire/project/service/volume-backup/index.blade.php
index 26b835cdc8..61c4657924 100644
--- a/resources/views/livewire/project/service/volume-backup/index.blade.php
+++ b/resources/views/livewire/project/service/volume-backup/index.blade.php
@@ -240,7 +240,7 @@
 
             @if ($backups->isNotEmpty() || $databaseBackups->isNotEmpty())
                 <div class="data-table w-full overflow-x-auto" x-show="filteredBackups.length > 0">
-                    <div class="min-w-[64rem]">
+                    <div class="flex min-w-[64rem] flex-col">
                     <div class="data-table-header backup-table-grid service-backup-table-grid">
                         <span>Target</span>
                         <span>Type</span>
diff --git a/tests/v4/Browser/BackupSortTest.php b/tests/v4/Browser/BackupSortTest.php
new file mode 100644
index 0000000000..096515f56a
--- /dev/null
+++ b/tests/v4/Browser/BackupSortTest.php
@@ -0,0 +1,96 @@
+<?php
+
+use App\Models\LocalPersistentVolume;
+use App\Models\ScheduledVolumeBackup;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Visus\Cuid2\Cuid2;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    $this->stack = seedBrowserResourceStack();
+});
+
+/**
+ * Creates volume backups for bravo, alpha, and charlie, in that order from oldest to newest.
+ */
+function createSortableVolumeBackups(Model $resource): void
+{
+    foreach (['bravo', 'alpha', 'charlie'] as $index => $name) {
+        $volume = LocalPersistentVolume::create([
+            'uuid' => (string) new Cuid2,
+            'name' => $name.'-data',
+            'mount_path' => '/data/'.$name,
+            'resource_id' => $resource->id,
+            'resource_type' => $resource->getMorphClass(),
+        ]);
+
+        $backup = ScheduledVolumeBackup::create([
+            'backupable_type' => $volume->getMorphClass(),
+            'backupable_id' => $volume->id,
+            'team_id' => 0,
+            'frequency' => '0 0 * * *',
+            'enabled' => true,
+        ]);
+
+        ScheduledVolumeBackup::whereKey($backup->id)->update(['created_at' => now()->subDays(10 - $index)]);
+    }
+}
+
+/**
+ * Returns the backup target names in the order the browser shows them, top to bottom.
+ */
+function visibleBackupOrderScript(): string
+{
+    return <<<'JS'
+        () => [...document.querySelectorAll('.data-table-row')]
+            .filter((row) => row.offsetParent !== null)
+            .sort((left, right) => left.getBoundingClientRect().top - right.getBoundingClientRect().top)
+            .map((row) => row.querySelector('span').textContent.trim())
+            .join(',')
+        JS;
+}
+
+function assertBackupSortOrders(mixed $page, string $screenshot): void
+{
+    $page->assertSee('alpha-data')
+        ->assertScript(visibleBackupOrderScript(), 'alpha-data,bravo-data,charlie-data')
+        ->click('Sort')
+        ->click('Target Z–A')
+        ->assertScript(visibleBackupOrderScript(), 'charlie-data,bravo-data,alpha-data')
+        ->click('Sort')
+        ->click('Oldest first')
+        ->assertScript(visibleBackupOrderScript(), 'bravo-data,alpha-data,charlie-data')
+        ->click('Sort')
+        ->click('Newest first')
+        ->assertScript(visibleBackupOrderScript(), 'charlie-data,alpha-data,bravo-data')
+        ->screenshot(filename: $screenshot);
+}
+
+it('reorders application storage backups when the sort option changes', function () {
+    $application = createBrowserApplication($this->stack, [
+        'uuid' => 'app-browser-backup-sort',
+        'name' => 'Backup Sort App',
+    ]);
+    createSortableVolumeBackups($application);
+
+    loginAndSkipBoarding();
+
+    $page = visit(applicationConfigurationUrl($this->stack['project'], $this->stack['environment'], $application).'/backups');
+
+    assertBackupSortOrders($page, 'application-backup-sort');
+});
+
+it('reorders service storage backups when the sort option changes', function () {
+    ['service' => $service, 'serviceApplication' => $serviceApplication] = createBrowserService($this->stack, [
+        'uuid' => 'svc-browser-backup-sort',
+    ]);
+    createSortableVolumeBackups($serviceApplication);
+
+    loginAndSkipBoarding();
+
+    $page = visit(serviceConfigurationUrl($this->stack['project'], $this->stack['environment'], $service).'/storage-backups');
+
+    assertBackupSortOrders($page, 'service-backup-sort');
+});