diff --git a/core/src/main/kotlin/com/bitwarden/core/data/manager/model/FlagKey.kt b/core/src/main/kotlin/com/bitwarden/core/data/manager/model/FlagKey.kt
index bed22817e5..0027f238df 100644
--- a/core/src/main/kotlin/com/bitwarden/core/data/manager/model/FlagKey.kt
+++ b/core/src/main/kotlin/com/bitwarden/core/data/manager/model/FlagKey.kt
@@ -38,6 +38,7 @@ sealed class FlagKey<out T : Any> {
                 ArchiveItems,
                 SendEmailVerification,
                 MobilePremiumUpgrade,
+                AttachmentUpdates,
             )
         }
     }
@@ -116,6 +117,14 @@ sealed class FlagKey<out T : Any> {
         override val defaultValue: Boolean = false
     }
 
+    /**
+     * Data object holding the feature flag key for the Attachment Feature Updates.
+     */
+    data object AttachmentUpdates : FlagKey<Boolean>() {
+        override val keyName: String = "pm-34224-mobile-attachment-updates"
+        override val defaultValue: Boolean = false
+    }
+
     //region Dummy keys for testing
     /**
      * Data object holding the key for a [Boolean] flag to be used in tests.
diff --git a/core/src/test/kotlin/com/bitwarden/core/data/manager/model/FlagKeyTest.kt b/core/src/test/kotlin/com/bitwarden/core/data/manager/model/FlagKeyTest.kt
index 845736dbbc..4cacb8a151 100644
--- a/core/src/test/kotlin/com/bitwarden/core/data/manager/model/FlagKeyTest.kt
+++ b/core/src/test/kotlin/com/bitwarden/core/data/manager/model/FlagKeyTest.kt
@@ -40,6 +40,10 @@ class FlagKeyTest {
             FlagKey.MobilePremiumUpgrade.keyName,
             "PM-31697-premium-upgrade-path",
         )
+        assertEquals(
+            FlagKey.AttachmentUpdates.keyName,
+            "pm-34224-mobile-attachment-updates",
+        )
     }
 
     @Test
@@ -54,6 +58,7 @@ class FlagKeyTest {
                 FlagKey.ArchiveItems,
                 FlagKey.SendEmailVerification,
                 FlagKey.MobilePremiumUpgrade,
+                FlagKey.AttachmentUpdates,
             ).all {
                 !it.defaultValue
             },
diff --git a/ui/src/main/kotlin/com/bitwarden/ui/platform/components/debug/FeatureFlagListItems.kt b/ui/src/main/kotlin/com/bitwarden/ui/platform/components/debug/FeatureFlagListItems.kt
index 84193580aa..2e26e29c19 100644
--- a/ui/src/main/kotlin/com/bitwarden/ui/platform/components/debug/FeatureFlagListItems.kt
+++ b/ui/src/main/kotlin/com/bitwarden/ui/platform/components/debug/FeatureFlagListItems.kt
@@ -32,6 +32,7 @@ fun <T : Any> FlagKey<T>.ListItemContent(
     FlagKey.ArchiveItems,
     FlagKey.SendEmailVerification,
     FlagKey.MobilePremiumUpgrade,
+    FlagKey.AttachmentUpdates,
         -> {
         @Suppress("UNCHECKED_CAST")
         BooleanFlagItem(
@@ -85,4 +86,5 @@ private fun <T : Any> FlagKey<T>.getDisplayLabel(): String = when (this) {
     FlagKey.ArchiveItems -> stringResource(BitwardenString.archive_items)
     FlagKey.SendEmailVerification -> stringResource(BitwardenString.send_email_verification)
     FlagKey.MobilePremiumUpgrade -> stringResource(BitwardenString.mobile_premium_upgrade)
+    FlagKey.AttachmentUpdates -> stringResource(BitwardenString.attachment_updates)
 }
diff --git a/ui/src/main/res/values/strings_non_localized.xml b/ui/src/main/res/values/strings_non_localized.xml
index 206100c289..a95fc6f3e1 100644
--- a/ui/src/main/res/values/strings_non_localized.xml
+++ b/ui/src/main/res/values/strings_non_localized.xml
@@ -46,6 +46,7 @@
     <string name="trigger_cookie_acquisition">Trigger cookie acquisition</string>
     <string name="clear_sso_cookies">Clear SSO cookies</string>
     <string name="mobile_premium_upgrade">Mobile Premium Upgrade</string>
+    <string name="attachment_updates">Attachment Updates</string>
 
     <!-- endregion Debug Menu -->
 </resources>