diff --git a/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/encrypt/EncryptedStorageAccessor.kt b/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/encrypt/EncryptedStorageAccessor.kt
index 76f5b7b..f524e7e 100644
--- a/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/encrypt/EncryptedStorageAccessor.kt
+++ b/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/encrypt/EncryptedStorageAccessor.kt
@@ -371,6 +371,14 @@ class EncryptedStorageAccessor(
         }
     }
 
+    override suspend fun forceClearSyncLock() {
+        syncLockMutex.withLock {
+            openWriteSystemFile(SYNC_LOCK_FILENAME).use { out ->
+                out.write(ByteArray(0))
+            }
+        }
+    }
+
     private suspend fun appendSyncEntry(path: String, operation: StorageSyncOperation) {
         val cleanedPath = if (path.startsWith("/")) path else "/$path"
         val entries = readSyncJournal()
diff --git a/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/local/LocalStorageAccessor.kt b/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/local/LocalStorageAccessor.kt
index 504ef8b..e7ca253 100644
--- a/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/local/LocalStorageAccessor.kt
+++ b/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/local/LocalStorageAccessor.kt
@@ -669,6 +669,27 @@ class LocalStorageAccessor(
         }
     }
 
+    override suspend fun forceClearSyncLock() = withContext(ioDispatcher) {
+        val lockPath = systemLockPath()
+        if (!Files.exists(lockPath)) {
+            return@withContext
+        }
+        Files.createDirectories(lockPath.parent)
+        FileChannel.open(
+            lockPath,
+            StandardOpenOption.READ,
+            StandardOpenOption.WRITE,
+        ).use { channel ->
+            val fileLock = channel.lock()
+            try {
+                channel.truncate(0)
+                channel.force(true)
+            } finally {
+                fileLock.release()
+            }
+        }
+    }
+
     private fun systemLockPath(): Path =
         _filesystemBasePath.resolve(SYSTEM_HIDDEN_DIRNAME).resolve(SYNC_LOCK_FILENAME)
 
diff --git a/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/yandex/YandexStorageAccessor.kt b/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/yandex/YandexStorageAccessor.kt
index 5083af3..46e57a9 100644
--- a/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/yandex/YandexStorageAccessor.kt
+++ b/domain-vault/src/main/java/com/github/nullptroma/wallenc/infrastructure/storages/yandex/YandexStorageAccessor.kt
@@ -636,6 +636,14 @@ class YandexStorageAccessor(
         }
     }
 
+    override suspend fun forceClearSyncLock() = withContext(ioDispatcher) {
+        syncLockMutex.withLock {
+            openWriteSystemFile(SYNC_LOCK_FILENAME).use { out ->
+                out.write(ByteArray(0))
+            }
+        }
+    }
+
     private suspend fun appendSyncEntry(path: String, operation: StorageSyncOperation) {
         val cleanedPath = if (path.startsWith("/")) path else "/$path"
         val entries = readSyncJournal()
diff --git a/domain/src/main/java/com/github/nullptroma/wallenc/domain/interfaces/IStorageAccessor.kt b/domain/src/main/java/com/github/nullptroma/wallenc/domain/interfaces/IStorageAccessor.kt
index c4913b1..ae9ad9c 100644
--- a/domain/src/main/java/com/github/nullptroma/wallenc/domain/interfaces/IStorageAccessor.kt
+++ b/domain/src/main/java/com/github/nullptroma/wallenc/domain/interfaces/IStorageAccessor.kt
@@ -59,4 +59,10 @@ interface IStorageAccessor {
     suspend fun readSyncLock(): StorageSyncLock?
     suspend fun tryAcquireSyncLock(holderId: String, leaseUntil: Instant): Boolean
     suspend fun releaseSyncLock(holderId: String)
+
+    /**
+     * Сбрасывает lock синхронизации без проверки [holderId] (снятие «залипшей» блокировки).
+     * Не использовать в обычном цикле синка — только для ручного вмешательства.
+     */
+    suspend fun forceClearSyncLock()
 }
\ No newline at end of file
diff --git a/ui/src/main/java/com/github/nullptroma/wallenc/ui/elements/StorageTree.kt b/ui/src/main/java/com/github/nullptroma/wallenc/ui/elements/StorageTree.kt
index 4cdad20..fe1f72f 100644
--- a/ui/src/main/java/com/github/nullptroma/wallenc/ui/elements/StorageTree.kt
+++ b/ui/src/main/java/com/github/nullptroma/wallenc/ui/elements/StorageTree.kt
@@ -29,6 +29,7 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.ripple
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -63,6 +64,8 @@ fun StorageTree(
     onDisableEncryption: (Tree<IStorageInfo>) -> Unit,
     getStatusText: (Tree<IStorageInfo>) -> String,
     isEncryptionOpened: (Tree<IStorageInfo>) -> Boolean,
+    isStorageSyncLockHeld: suspend (IStorageInfo) -> Boolean,
+    onClearStorageSyncLock: (IStorageInfo) -> Unit,
 ) {
     val cur = tree.value
     val available by cur.isAvailable.collectAsStateWithLifecycle()
@@ -125,6 +128,15 @@ fun StorageTree(
                         horizontalAlignment = Alignment.End
                     ) {
                         var expanded by remember { mutableStateOf(false) }
+                        var syncLockHeld by remember { mutableStateOf<Boolean?>(null) }
+                        LaunchedEffect(expanded, cur.uuid) {
+                            if (expanded) {
+                                syncLockHeld = null
+                                syncLockHeld = isStorageSyncLockHeld(cur)
+                            } else {
+                                syncLockHeld = null
+                            }
+                        }
                         var showRenameDialog by remember { mutableStateOf(false) }
                         var showRemoveConfirmDialog by remember { mutableStateOf(false) }
                         var showLockDialog by remember { mutableStateOf(false) }
@@ -166,6 +178,25 @@ fun StorageTree(
                                         text = { Text(stringResource(R.string.encrypt)) }
                                     )
                                 }
+                                HorizontalDivider()
+                                DropdownMenuItem(
+                                    enabled = syncLockHeld == true,
+                                    onClick = {
+                                        expanded = false
+                                        if (syncLockHeld == true) {
+                                            onClearStorageSyncLock(cur)
+                                        }
+                                    },
+                                    text = {
+                                        Text(
+                                            when (syncLockHeld) {
+                                                null -> stringResource(R.string.storage_sync_lock_checking)
+                                                true -> stringResource(R.string.storage_sync_unlock_action)
+                                                false -> stringResource(R.string.storage_sync_not_locked)
+                                            },
+                                        )
+                                    },
+                                )
                             }
 
                             if (showRenameDialog) {
@@ -295,7 +326,9 @@ fun StorageTree(
                 onCloseEncrypted,
                 onDisableEncryption,
                 getStatusText,
-                isEncryptionOpened
+                isEncryptionOpened,
+                isStorageSyncLockHeld,
+                onClearStorageSyncLock,
             )
         }
     }
diff --git a/ui/src/main/java/com/github/nullptroma/wallenc/ui/screens/main/screens/vault/AbstractVaultBrowserViewModel.kt b/ui/src/main/java/com/github/nullptroma/wallenc/ui/screens/main/screens/vault/AbstractVaultBrowserViewModel.kt
index c7296bd..0fe6a43 100644
--- a/ui/src/main/java/com/github/nullptroma/wallenc/ui/screens/main/screens/vault/AbstractVaultBrowserViewModel.kt
+++ b/ui/src/main/java/com/github/nullptroma/wallenc/ui/screens/main/screens/vault/AbstractVaultBrowserViewModel.kt
@@ -328,4 +328,37 @@ abstract class AbstractVaultBrowserViewModel(
         val openedMap = getOpenedStoragesUseCase.openedStorages.value
         return openedMap.containsKey(storage.uuid)
     }
+
+    suspend fun isStorageSyncLockHeld(storage: IStorageInfo): Boolean {
+        val s = storage as? IStorage ?: return false
+        return try {
+            s.accessor.readSyncLock() != null
+        } catch (_: Exception) {
+            false
+        }
+    }
+
+    fun clearStorageSyncLock(storage: IStorageInfo) {
+        taskOrchestrator.enqueue(
+            title = "Снятие блокировки синхронизации",
+            dispatcher = Dispatchers.IO,
+            work = { ctx ->
+                try {
+                    val s = storage as? IStorage
+                    if (s == null) {
+                        ctx.log(TaskLogLevel.Error, "Некорректное хранилище")
+                        _messages.emit("Некорректное хранилище")
+                        return@enqueue
+                    }
+                    ctx.log(TaskLogLevel.Info, "Снимаю блокировку синхронизации…")
+                    s.accessor.forceClearSyncLock()
+                    ctx.log(TaskLogLevel.Info, "Блокировка синхронизации снята")
+                    _messages.emit("Блокировка синхронизации снята")
+                } catch (e: Exception) {
+                    ctx.log(TaskLogLevel.Error, e.message ?: "Не удалось снять блокировку")
+                    _messages.emit(e.message ?: "Не удалось снять блокировку синхронизации")
+                }
+            },
+        )
+    }
 }
diff --git a/ui/src/main/java/com/github/nullptroma/wallenc/ui/screens/main/screens/vault/VaultBrowserScreen.kt b/ui/src/main/java/com/github/nullptroma/wallenc/ui/screens/main/screens/vault/VaultBrowserScreen.kt
index fe6aa93..46565a3 100644
--- a/ui/src/main/java/com/github/nullptroma/wallenc/ui/screens/main/screens/vault/VaultBrowserScreen.kt
+++ b/ui/src/main/java/com/github/nullptroma/wallenc/ui/screens/main/screens/vault/VaultBrowserScreen.kt
@@ -90,6 +90,8 @@ fun VaultBrowserScreen(
                         onDisableEncryption = { tree -> viewModel.disableEncryption(tree.value) },
                         getStatusText = { tree -> viewModel.getStorageStatus(tree.value) },
                         isEncryptionOpened = { tree -> viewModel.isEncryptionSessionOpen(tree.value) },
+                        isStorageSyncLockHeld = { info -> viewModel.isStorageSyncLockHeld(info) },
+                        onClearStorageSyncLock = { info -> viewModel.clearStorageSyncLock(info) },
                     )
                 }
                 item { Spacer(modifier = Modifier.height(8.dp)) }
diff --git a/ui/src/main/res/values/strings.xml b/ui/src/main/res/values/strings.xml
index 1892d1e..641a216 100644
--- a/ui/src/main/res/values/strings.xml
+++ b/ui/src/main/res/values/strings.xml
@@ -34,6 +34,9 @@
     <string name="new_name_title">New name</string>
     <string name="remove_confirmation_dialog">Delete storage "%1$s"?</string>
     <string name="storage_lock_actions">Storage encryption actions</string>
+    <string name="storage_sync_lock_checking">Проверка блокировки…</string>
+    <string name="storage_sync_unlock_action">Снять блокировку синхронизации</string>
+    <string name="storage_sync_not_locked">Синхронизация не заблокирована</string>
 
     <string name="task_pipeline_title">Task pipeline</string>
     <string name="task_pipeline_jobs">Jobs</string>
diff --git a/usecases/src/main/java/com/github/nullptroma/wallenc/usecases/RunStorageSyncUseCase.kt b/usecases/src/main/java/com/github/nullptroma/wallenc/usecases/RunStorageSyncUseCase.kt
index c7be295..0f6f023 100644
--- a/usecases/src/main/java/com/github/nullptroma/wallenc/usecases/RunStorageSyncUseCase.kt
+++ b/usecases/src/main/java/com/github/nullptroma/wallenc/usecases/RunStorageSyncUseCase.kt
@@ -27,8 +27,14 @@ class RunStorageSyncUseCase(
                     syncEngine.syncAllGroups { fraction, label ->
                         ctx.reportProgress(fraction, label)
                     }
+                    ctx.log(TaskLogLevel.Info, "Storage sync finished")
                     ctx.reportProgress(null, "Storage sync: completed")
-                } finally {
+                }
+                catch (e: Exception) {
+                    ctx.log(TaskLogLevel.Error, "Storage sync failed: ${e.message}")
+                    ctx.reportProgress(null, "Storage sync: failed - ${e.message}")
+                }
+                finally {
                     running.set(false)
                 }
             },