diff --git a/doc/sandbox-work-folders.md b/doc/sandbox-work-folders.md
index beedf9b42d..16ace68e16 100644
--- a/doc/sandbox-work-folders.md
+++ b/doc/sandbox-work-folders.md
@@ -1,5 +1,7 @@
 # Sandbox work folders
 
+Shared folders can contain saved files from several sandboxes. The cached-file inspector keeps earlier run failures visible with a **View failed run** link, separately from the last successful save time and direct file-operation errors.
+
 The deployed acceptance entry point is `pnpm test:e2e:work-folders:deployed`.
 Set `PAPERCLIP_DEPLOYED_STACK_MANIFEST` to a JSON manifest matching
 `tests/runner-e2e/deployed-stack.ts`, `PAPERCLIP_DEPLOYED_STACK_AUTH` to a private
diff --git a/packages/shared/src/work-folders.ts b/packages/shared/src/work-folders.ts
index 3e1ba33c27..17cfd0e4f4 100644
--- a/packages/shared/src/work-folders.ts
+++ b/packages/shared/src/work-folders.ts
@@ -33,6 +33,8 @@ export interface WorkFolderListing {
 
 export interface WorkFolderSyncStatus {
   runId: string;
+  /** Identifies the run to inspect when a shared folder has an unsaved copy. */
+  agentId?: string;
   state: "starting" | "saved" | "saving" | "failed";
   lastSavedAt: string | null;
   error: string | null;
diff --git a/server/src/__tests__/work-folder-routes.test.ts b/server/src/__tests__/work-folder-routes.test.ts
index bd93a75a15..01d1846c50 100644
--- a/server/src/__tests__/work-folder-routes.test.ts
+++ b/server/src/__tests__/work-folder-routes.test.ts
@@ -72,6 +72,8 @@ describe("work folder HTTP ownership and streaming", () => {
       folders: { task: null, agent: null, user: folder.id, project: null }, repositories: [] } });
     const runApp = app({ type: "agent", source: "agent_jwt", companyId, agentId, runId, onBehalfOfUserId: ownerId });
     await request(runApp).get(base).expect(200);
+    const sync = await request(runApp).get(`${base}/sync`).expect(200);
+    expect(sync.body).toEqual([expect.objectContaining({ runId, agentId, active: true })]);
     await db.update(companyMemberships).set({ status: "inactive" }).where(and(eq(companyMemberships.companyId, companyId), eq(companyMemberships.principalId, ownerId)));
     await request(runApp).get(base).expect(404);
     await db.update(companyMemberships).set({ status: "active" }).where(and(eq(companyMemberships.companyId, companyId), eq(companyMemberships.principalId, ownerId)));
diff --git a/server/src/routes/work-folders.ts b/server/src/routes/work-folders.ts
index ac119ef99b..c824cf9b67 100644
--- a/server/src/routes/work-folders.ts
+++ b/server/src/routes/work-folders.ts
@@ -94,7 +94,7 @@ export function workFolderRoutes(db: Db, provider?: StorageProvider) {
         if (includedCompletedSave) return [];
         includedCompletedSave = true;
       }
-      return [{ runId: row.runId, state: row.state, lastSavedAt: row.lastSavedAt, error: row.error,
+      return [{ runId: row.runId, agentId: row.manifest.agentId, state: row.state, lastSavedAt: row.lastSavedAt, error: row.error,
         refreshRequested: row.refreshRequested, active }];
     }));
   });
diff --git a/ui/src/components/WorkFolderBrowser.test.tsx b/ui/src/components/WorkFolderBrowser.test.tsx
index f3fafa71cf..b3cd2f264c 100644
--- a/ui/src/components/WorkFolderBrowser.test.tsx
+++ b/ui/src/components/WorkFolderBrowser.test.tsx
@@ -1,17 +1,20 @@
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { renderToStaticMarkup } from "react-dom/server";
-import { describe, expect, it } from "vitest";
+import { describe, expect, it, vi } from "vitest";
+import { MemoryRouter } from "react-router-dom";
 import type { WorkFolderSyncStatus } from "@paperclipai/shared";
 import { TooltipProvider } from "@/components/ui/tooltip";
 import { WorkFolderBrowser } from "./WorkFolderBrowser";
 
+vi.mock("@/context/CompanyContext", () => ({ useCompany: () => ({ selectedCompany: { issuePrefix: "STG" } }) }));
+
 const owner = { companyId: "company", scope: "task" as const, ownerId: "task" };
 const key = ["work-folders", owner.companyId, owner.scope, owner.ownerId];
 function render(statuses: WorkFolderSyncStatus[], lastOperationAt: string | null, readOnly = false) {
   const client = new QueryClient({ defaultOptions: { queries: { retry: false, staleTime: Infinity } } });
   client.setQueryData([...key, "files", false], { files: [], lastOperationAt });
   client.setQueryData([...key, "sync"], statuses);
-  return renderToStaticMarkup(<QueryClientProvider client={client}><TooltipProvider><WorkFolderBrowser owner={owner} readOnly={readOnly} /></TooltipProvider></QueryClientProvider>);
+  return renderToStaticMarkup(<MemoryRouter initialEntries={["/STG/issues/task"]}><QueryClientProvider client={client}><TooltipProvider><WorkFolderBrowser owner={owner} readOnly={readOnly} /></TooltipProvider></QueryClientProvider></MemoryRouter>);
 }
 const checkpoint: WorkFolderSyncStatus = { runId: "run", state: "saved", active: false,
   lastSavedAt: "2026-09-07T12:00:00.000Z", error: null, refreshRequested: false };
@@ -34,11 +37,20 @@ describe("work folder save feedback", () => {
   });
   it("keeps the last successful checkpoint visible during a failed or pending save", () => {
     const failed = render([{ ...checkpoint, state: "failed", error: "Working copy retained" }], null);
-    expect(failed).toContain('role="status">Save failed');
+    expect(failed).toContain('role="status">Run save failed');
     expect(failed).toContain("Last agent save");
     expect(failed).toContain("Working copy retained");
     const saving = render([{ ...checkpoint, state: "saving", active: true }], null);
     expect(saving).toContain('role="status">Saving…');
     expect(saving).toContain("Last agent save");
   });
+  it("identifies the failed run when a shared folder also has a newer successful save", () => {
+    const html = render([checkpoint, { ...checkpoint, runId: "older-run", agentId: "other-agent", state: "failed",
+      lastSavedAt: "2026-09-06T12:00:00.000Z", error: "Working copy retained" }], null, true);
+    expect(html).toContain('role="status">Run save failed');
+    expect(html).toContain("The files below are saved copies.");
+    expect(html).toContain('href="/STG/agents/other-agent/runs/older-run"');
+    expect(html).toContain("View failed run");
+    expect(html).toContain("Last agent save");
+  });
 });
diff --git a/ui/src/components/WorkFolderBrowser.tsx b/ui/src/components/WorkFolderBrowser.tsx
index aca1db77e4..9ba569258a 100644
--- a/ui/src/components/WorkFolderBrowser.tsx
+++ b/ui/src/components/WorkFolderBrowser.tsx
@@ -11,6 +11,7 @@ import { Input } from "@/components/ui/input";
 import { cn } from "@/lib/utils";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { Label } from "@/components/ui/label";
+import { Link } from "@/lib/router";
 
 function tree(files: WorkFile[]) {
   const root: FileTreeNode = { name: "", path: "", kind: "dir", children: [] };
@@ -65,7 +66,7 @@ export function WorkFolderBrowser({ owner, exampleFiles, readOnly = false, fillH
     }
     else if (action.type === "restore" || action.type === "purge") await workFoldersApi.operation(owner, { action: action.type, fileId: action.fileId }, crypto.randomUUID());
     else for (const run of (syncQuery.data ?? []).filter((run) => run.active)) await workFoldersApi.refresh(owner, run.runId);
-  }, onSuccess: async (_data, action) => {
+  }, onMutate: () => setAnnouncement(""), onSuccess: async (_data, action) => {
     setAnnouncement(action.type === "refresh" ? "Refresh requested for the next safe run boundary." : "Files saved.");
   }, onSettled: () => queryClient.invalidateQueries({ queryKey: key }) });
   const statuses = syncQuery.data ?? [];
@@ -74,7 +75,6 @@ export function WorkFolderBrowser({ owner, exampleFiles, readOnly = false, fillH
   const lastSaved = statuses.map((status) => status.lastSavedAt)
     .filter((value): value is string => Boolean(value)).sort().at(-1);
   const lastOperation = filesQuery.data?.lastOperationAt;
-  const saveFailed = Boolean(failed) || mutation.isError;
   const disabled = mutation.isPending || Boolean(exampleFiles);
   return <Tabs value={trash ? "trash" : "files"} onValueChange={(value) => { setTrash(value === "trash"); setSelectedPath(null); setCheckedFiles(new Set()); }} className={cn("flex min-h-0 flex-col gap-3", fillHeight && "flex-1")}>
     <div className="flex shrink-0 flex-wrap items-center gap-2">
@@ -89,7 +89,7 @@ export function WorkFolderBrowser({ owner, exampleFiles, readOnly = false, fillH
       </TabsList>
       {!trash && canManageTrash && checkedPaths.length > 0 && <Button variant="outline" size="sm" disabled={disabled} onClick={() => mutation.mutate({ type: "deleteSelected", paths: checkedPaths })}><Trash2 aria-hidden />Move {checkedPaths.length} {checkedPaths.length === 1 ? "file" : "files"} to trash</Button>}
       {!readOnly && <Button variant="outline" size="sm" disabled={disabled || !statuses.some((status) => status.active)} onClick={() => mutation.mutate({ type: "refresh" })}><RefreshCw aria-hidden />Refresh sandbox</Button>}
-      <span className="text-xs text-muted-foreground" role="status">{saving ? "Saving…" : saveFailed ? "Save failed" : "Saved"}</span>
+      <span className="text-xs text-muted-foreground" role="status">{saving ? "Saving…" : mutation.isError ? "Save failed" : failed ? "Run save failed" : "Saved"}</span>
       {lastSaved && <span className="text-xs text-muted-foreground">Last agent save {new Date(lastSaved).toLocaleTimeString()}</span>}
       {lastOperation && (!lastSaved || lastOperation > lastSaved) && <span className="text-xs text-muted-foreground">Files updated {new Date(lastOperation).toLocaleTimeString()}</span>}
     </div>
@@ -98,7 +98,10 @@ export function WorkFolderBrowser({ owner, exampleFiles, readOnly = false, fillH
       <Button variant="outline" size="sm" disabled={disabled || !directory} onClick={() => mutation.mutate({ type: "mkdir" })}><FolderPlus aria-hidden />Create folder</Button>
     </div>}
     {[filesQuery.error, syncQuery.error, mutation.error].filter(Boolean).map((error, index) => <p key={index} role="alert" className="text-sm text-destructive">{(error as Error).message}</p>)}
-    {failed && <p role="alert" className="text-sm text-destructive">{failed.error}</p>}
+    {failed && <p role="alert" className="text-sm text-destructive">
+      A sandbox run could not save its files. The files below are saved copies. {failed.error}{" "}
+      {failed.agentId && <Link className="underline" to={`/agents/${encodeURIComponent(failed.agentId)}/runs/${encodeURIComponent(failed.runId)}`}>View failed run</Link>}
+    </p>}
     <p className="sr-only" aria-live="polite">{announcement}</p>
     {trash ? <TabsContent value="trash" className={cn("overflow-auto", fillHeight ? "min-h-0 flex-1" : "max-h-96")}><p className="mb-3 text-sm text-muted-foreground">Deleted cached files are retained here. Restore them to return them to Files.</p>{files.length === 0 ? <p className="text-sm text-muted-foreground">Trash is empty.</p> : files.map((file) => <div key={file.id} className="flex items-center gap-2 border-b py-2">
       <span className="min-w-0 flex-1 truncate text-sm">{file.path}</span>{canManageTrash && <Button size="sm" variant="outline" disabled={disabled} onClick={() => mutation.mutate({ type: "restore", fileId: file.id })}><RotateCcw aria-hidden />Restore</Button>}
diff --git a/ui/storybook/fixtures/workFolders.ts b/ui/storybook/fixtures/workFolders.ts
index 5f8d5e183a..4cd3be96e2 100644
--- a/ui/storybook/fixtures/workFolders.ts
+++ b/ui/storybook/fixtures/workFolders.ts
@@ -9,6 +9,7 @@ export type WorkFolderScenario =
   | "saved"
   | "saving"
   | "failed"
+  | "olderFailure"
   | "empty"
   | "loading"
   | "unavailable"
@@ -147,6 +148,7 @@ export function createWorkFolderFixture(
     if (action === "sync") {
       const status: WorkFolderSyncStatus = {
         runId: "run-storybook",
+        agentId: workFolderOwners.agent.ownerId,
         state:
           scenario === "saving"
             ? "saving"
@@ -161,7 +163,11 @@ export function createWorkFolderFixture(
             ? "Storage is unavailable. Your working files are retained in the sandbox; retry when storage recovers."
             : null,
       };
-      return Response.json([status]);
+      return Response.json(scenario === "olderFailure" ? [status, {
+        ...status, runId: "earlier-run-storybook", state: "failed", active: false,
+        lastSavedAt: "2026-09-07T14:00:00.000Z",
+        error: "An earlier sandbox could not reach storage. Its working copy was retained.",
+      }] : [status]);
     }
     if (action === "refresh") return Response.json({ ok: true });
     if (!action) {
diff --git a/ui/storybook/stories/work-folders.stories.tsx b/ui/storybook/stories/work-folders.stories.tsx
index 202879be44..128bb9efa3 100644
--- a/ui/storybook/stories/work-folders.stories.tsx
+++ b/ui/storybook/stories/work-folders.stories.tsx
@@ -32,6 +32,7 @@ const meta = {
         "saved",
         "saving",
         "failed",
+        "olderFailure",
         "empty",
         "loading",
         "unavailable",
@@ -100,6 +101,7 @@ export const EmptyFolder: Story = { args: { scenario: "empty" } };
 export const Loading: Story = { args: { scenario: "loading" } };
 export const Saving: Story = { args: { scenario: "saving" } };
 export const SaveFailed: Story = { args: { scenario: "failed" } };
+export const SharedFolderWithEarlierFailure: Story = { args: { scope: "agent", scenario: "olderFailure" } };
 export const StorageUnavailable: Story = { args: { scenario: "unavailable" } };
 export const UploadFailed: Story = {
   args: { scenario: "uploadFailed" },