diff --git a/frontend/src/components/simulator/ComponentPropertyDialog.tsx b/frontend/src/components/simulator/ComponentPropertyDialog.tsx
index 89ce04fe..4311d2f1 100644
--- a/frontend/src/components/simulator/ComponentPropertyDialog.tsx
+++ b/frontend/src/components/simulator/ComponentPropertyDialog.tsx
@@ -336,8 +336,11 @@ export const ComponentPropertyDialog: React.FC<ComponentPropertyDialogProps> = (
       )}
 
       {/* microSD card — upload your own files (paid). Free auto-copy of the
-          project's files happens at simulation start, not here. */}
-      {componentMetadata.id === 'microsd-card' && (
+          project's files happens at simulation start, not here. Parts that
+          carry their OWN TF slot (metadata.sdSlot, e.g. the Seeed Round
+          Display shield) get the same panel: their attach reads
+          properties.sdFiles when it builds the card image. */}
+      {(componentMetadata.id === 'microsd-card' || componentMetadata.sdSlot === true) && (
         <SdCardPanel
           files={(componentProperties.sdFiles as UploadedSdFile[] | undefined) ?? []}
           onChange={(next) => onPropertyChange?.(componentId, 'sdFiles', next)}
diff --git a/frontend/src/types/component-metadata.ts b/frontend/src/types/component-metadata.ts
index 5fc808f4..dffaf4cb 100644
--- a/frontend/src/types/component-metadata.ts
+++ b/frontend/src/types/component-metadata.ts
@@ -51,6 +51,12 @@ export interface ComponentMetadata {
   // ComponentRegistry sorts featured components first after loading the
   // metadata, keeping the original order within each group.
   featured?: boolean;
+  // The part carries a microSD/TF slot of its own (e.g. the Seeed Round
+  // Display shield). The property dialog shows the same "SD Card" upload
+  // panel the standalone microsd-card gets, and the part's simulation reads
+  // `properties.sdFiles` when it builds the card image. Without this flag a
+  // built-in slot exists electrically but there is no way to put files on it.
+  sdSlot?: boolean;
 }
 
 export interface ComponentMetadataCollection {