diff --git a/locales/rn/en.json b/locales/rn/en.json
index f81aa537..0075aa38 100644
--- a/locales/rn/en.json
+++ b/locales/rn/en.json
@@ -515,6 +515,7 @@
     "shared_with": "Shared with",
     "sharing_access": "Sharing & access",
     "symlink": "Symbolic link",
+    "trash_unavailable_message": "{count, plural, one {This item} other {These # items}} can't be moved to the trash. Delete permanently instead? You can't undo this.",
     "upload": "Upload",
     "upload_failed": "{count, plural, one {1 file could not be uploaded} other {# files could not be uploaded}}",
     "upload_unavailable": "The file picker is not installed in this build. Rebuild the app to enable uploads.",
diff --git a/src/api/__tests__/files-trash.test.ts b/src/api/__tests__/files-trash.test.ts
index c3830df4..8229d90f 100644
--- a/src/api/__tests__/files-trash.test.ts
+++ b/src/api/__tests__/files-trash.test.ts
@@ -21,7 +21,9 @@ vi.mock('../jmap-client', () => ({
 
 import { jmapClient } from '../jmap-client';
 import type { FileNode } from '../types';
-import { emptyTrash, moveToTrash, purgeFromTrash, restoreFromTrash, undoMoveToTrash } from '../files-trash';
+import {
+  TrashUnavailableError, emptyTrash, moveToTrash, purgeFromTrash, restoreFromTrash, undoMoveToTrash,
+} from '../files-trash';
 import { trashedItems } from '../../lib/files-trash';
 
 // A Stalwart-like FileNode store for the user's own account: destroy without
@@ -171,6 +173,29 @@ describe('moveToTrash', () => {
     expect(destroy?.onDestroyRemoveChildren).toBeUndefined();
   });
 
+  it('says the trash cannot be had when a file at the root is named .Trash', async () => {
+    store.push({ id: 'f', parentId: null, name: '.Trash', blobId: 'bf' });
+    const nodes = listed();
+    const err = await moveToTrash(nodes, nodes.filter((n) => n.id === 'a'), 1730112000005).catch((e) => e);
+    expect(err).toBeInstanceOf(TrashUnavailableError);
+    expect(calls.some((c) => c.update)).toBe(false);
+    expect(byId('a')!.parentId).toBe('docs');
+  });
+
+  it('says the trash cannot be had when no folder can be made in it (quota)', async () => {
+    store.push({ id: 'T', parentId: null, name: '.Trash', blobId: null });
+    const real = (jmapClient.request as ReturnType<typeof vi.fn>).getMockImplementation() as (c: any[]) => Promise<unknown>;
+    (jmapClient.request as ReturnType<typeof vi.fn>).mockImplementation(async (methodCalls: any[]) => {
+      if (methodCalls[0][1].create) {
+        return { methodResponses: [['FileNode/set', { notCreated: { 'new-dir': { type: 'overQuota' } } }, '0']] };
+      }
+      return real(methodCalls);
+    });
+    const nodes = listed();
+    await expect(moveToTrash(nodes, nodes.filter((n) => n.id === 'a'), 1730112000005)).rejects.toBeInstanceOf(TrashUnavailableError);
+    expect(byId('a')!.parentId).toBe('docs');
+  });
+
   it('reports a partial refusal and keeps what went', async () => {
     refuseUpdate.add('b');
     const nodes = listed();
diff --git a/src/api/files-trash.ts b/src/api/files-trash.ts
index 5c651c6f..6d6d3114 100644
--- a/src/api/files-trash.ts
+++ b/src/api/files-trash.ts
@@ -62,6 +62,18 @@ export interface TrashMoveResult extends TrashWriteResult {
   drive: TrashDrive;
 }
 
+/**
+ * The trash, or a delete's folder in it, can't be made: a file is named
+ * `.Trash` at the root, the user may not create folders there, or the quota
+ * is used up. Nothing was moved; the items can only be deleted for good.
+ */
+export class TrashUnavailableError extends Error {
+  constructor(readonly reason: unknown) {
+    super(reason instanceof Error ? reason.message : 'The trash cannot be used');
+    this.name = 'TrashUnavailableError';
+  }
+}
+
 /** The trash folder, created on the first delete. */
 async function ensureTrashFolder(nodes: FileNode[]): Promise<FileNode> {
   const known = findTrashFolder(nodes);
@@ -72,7 +84,7 @@ async function ensureTrashFolder(nodes: FileNode[]): Promise<FileNode> {
     // Another client may have made it since the drive was listed.
     const fresh = findTrashFolder(await getAllFileNodes());
     if (fresh) return fresh;
-    throw err;
+    throw new TrashUnavailableError(err);
   }
 }
 
@@ -116,13 +128,25 @@ export async function moveToTrash(
       // the drive again and try once more.
       trash = await ensureTrashFolder(await getAllFileNodes());
       assertDrive(drive);
-      return createFolder(name, trash.id);
+      try {
+        return await createFolder(name, trash.id);
+      } catch (err) {
+        throw new TrashUnavailableError(err);
+      }
     }
   };
 
   for (const [parentId, group] of groups) {
     if (!isCurrentDrive(drive)) break;
-    const batch = await createBatch(parentId);
+    let batch: FileNode;
+    try {
+      batch = await createBatch(parentId);
+    } catch (err) {
+      // What went already stays in the trash; the rest is reported.
+      if (!(err instanceof TrashUnavailableError) || result.done.length === 0) throw err;
+      result.refused.push(new JMAPSetError('setError', err.message));
+      break;
+    }
     if (!isCurrentDrive(drive)) break;
     const update = await updateFileNodes(Object.fromEntries(group.map((n) => [n.id, { parentId: batch.id }])));
     const moved = new Set(update.updated);
diff --git a/src/screens/FilesScreen.tsx b/src/screens/FilesScreen.tsx
index de35b30b..bda92a6d 100644
--- a/src/screens/FilesScreen.tsx
+++ b/src/screens/FilesScreen.tsx
@@ -52,7 +52,8 @@ import {
   isSymlink, listFolder, moveFileNode, renameFileNode, supportsSharing, uploadFileBatch,
 } from '../api/files';
 import {
-  emptyTrash, moveToTrash, purgeFromTrash, restoreFromTrash, undoMoveToTrash, type TrashMoveResult,
+  TrashUnavailableError, emptyTrash, moveToTrash, purgeFromTrash, restoreFromTrash, undoMoveToTrash,
+  type TrashMoveResult,
 } from '../api/files-trash';
 import { trashOriginPath, trashedItems, withoutTrash, type TrashedItem } from '../lib/files-trash';
 import { toast } from '../stores/toast-store';
@@ -232,7 +233,8 @@ export default function FilesScreen() {
 
   // The trash (lib/files-trash) is a place of its own, entered from the root.
   const [inTrash, setInTrash] = useState(false);
-  const [confirmDelete, setConfirmDelete] = useState<{ rows: FileRow[] } | null>(null);
+  // `noTrash`: the rows were meant for the trash, which could not be made.
+  const [confirmDelete, setConfirmDelete] = useState<{ rows: FileRow[]; noTrash?: boolean } | null>(null);
   const [confirmEmptyTrash, setConfirmEmptyTrash] = useState(false);
   const [newFolderOpen, setNewFolderOpen] = useState(false);
   const [newFolderName, setNewFolderName] = useState('');
@@ -783,7 +785,10 @@ export default function FilesScreen() {
         { action: { label: t('files.undo', 'Undo'), onPress: () => void undoTrash(moved) } },
       );
     } catch (e) {
-      Alert.alert(t('files.delete_error', 'Failed to delete'), fileErrorMessage(e, t));
+      // No trash to be had here (a file named .Trash at the root, no right
+      // to create folders there, a full quota): offer to delete for good.
+      if (e instanceof TrashUnavailableError) setConfirmDelete({ rows, noTrash: true });
+      else Alert.alert(t('files.delete_error', 'Failed to delete'), fileErrorMessage(e, t));
       await loadFiles('refresh');
     }
   }, [allNodes, clearSelection, loadFiles, undoTrash, t]);
@@ -1393,7 +1398,11 @@ export default function FilesScreen() {
           count: confirmDelete?.rows.length ?? 1,
         })}
         message={
-          confirmDelete && confirmDelete.rows.length > 1
+          confirmDelete?.noTrash
+            ? t('files.trash_unavailable_message', "{count, plural, one {This item} other {These # items}} can't be moved to the trash. Delete permanently instead? You can't undo this.", {
+              count: confirmDelete.rows.length,
+            })
+            : confirmDelete && confirmDelete.rows.length > 1
             ? t('files.delete_forever_message_count', "{count, plural, one {1 item} other {# items}} will be deleted. You can't undo this.", {
               count: confirmDelete.rows.length,
             })