diff --git a/lib/Command/Generate.php b/lib/Command/Generate.php
index 78ae879..7e7663c 100644
--- a/lib/Command/Generate.php
+++ b/lib/Command/Generate.php
@@ -36,6 +36,7 @@
 use OCP\IPreview;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCA\Files_External\Service\GlobalStoragesService;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
@@ -43,6 +44,9 @@
 use Symfony\Component\Console\Output\OutputInterface;
 
 class Generate extends Command {
+	
+	/** @var GlobalStoragesService */
+	protected $globalService;
 
 	/** @var IUserManager */
 	protected $userManager;
@@ -69,7 +73,8 @@ public function __construct(IRootFolder $rootFolder,
 								IUserManager $userManager,
 								IPreview $previewGenerator,
 								IConfig $config,
-								IManager $encryptionManager) {
+								IManager $encryptionManager,
+								GlobalStoragesService $globalService = null) {
 		parent::__construct();
 
 		$this->userManager = $userManager;
@@ -77,6 +82,7 @@ public function __construct(IRootFolder $rootFolder,
 		$this->previewGenerator = $previewGenerator;
 		$this->config = $config;
 		$this->encryptionManager = $encryptionManager;
+		$this->globalService = $globalService;
 	}
 
 	protected function configure() {
@@ -133,6 +139,24 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 		return 0;
 	}
 
+	private function getNoPreviewMountPaths(IUser $user) {
+		if ($this->globalService === null) {
+			return [];
+		}
+		$mountPaths = [];
+		$userId = $user->getUID();
+		$mounts = $this->globalService->getStorageForAllUsers();
+		foreach ($mounts as $mount) {
+			if (in_array($userId, $mount->getApplicableUsers()) &&
+				$mount->getMountOptions()['previews'] === false
+			) {
+				$userFolder = $this->rootFolder->getUserFolder($userId)->getPath();
+				array_push($mountPaths, $userFolder.$mount->getMountPoint());
+			}
+		}
+		return $mountPaths;
+	}
+
 	private function generatePathPreviews(IUser $user, string $path) {
 		\OC_Util::tearDownFS();
 		\OC_Util::setupFS($user->getUID());
@@ -144,7 +168,8 @@ private function generatePathPreviews(IUser $user, string $path) {
 			return;
 		}
 		$pathFolder = $userFolder->get($relativePath);
-		$this->parseFolder($pathFolder);
+		$noPreviewMountPaths = $this->getNoPreviewMountPaths($user);
+		$this->parseFolder($pathFolder, $noPreviewMountPaths);
 	}
 
 	private function generateUserPreviews(IUser $user) {
@@ -152,24 +177,28 @@ private function generateUserPreviews(IUser $user) {
 		\OC_Util::setupFS($user->getUID());
 
 		$userFolder = $this->rootFolder->getUserFolder($user->getUID());
-		$this->parseFolder($userFolder);
+		$noPreviewMountPaths = $this->getNoPreviewMountPaths($user);
+		$this->parseFolder($userFolder, $noPreviewMountPaths);
 	}
 
-	private function parseFolder(Folder $folder) {
+	private function parseFolder(Folder $folder, $noPreviewMountPaths) {
 		try {
+			$folderPath = $folder->getPath();
+
 			// Respect the '.nomedia' file. If present don't traverse the folder
-			if ($folder->nodeExists('.nomedia')) {
-				$this->output->writeln('Skipping folder ' . $folder->getPath());
+			// Same for external mounts with previews disabled
+			if ($folder->nodeExists('.nomedia') || in_array($folderPath, $noPreviewMountPaths)) {
+				$this->output->writeln('Skipping folder ' . $folderPath);
 				return;
 			}
 
-			$this->output->writeln('Scanning folder ' . $folder->getPath());
+			$this->output->writeln('Scanning folder ' . $folderPath);
 
 			$nodes = $folder->getDirectoryListing();
 
 			foreach ($nodes as $node) {
 				if ($node instanceof Folder) {
-					$this->parseFolder($node);
+					$this->parseFolder($node, $noPreviewMountPaths);
 				} elseif ($node instanceof File) {
 					$this->parseFile($node);
 				}
diff --git a/tests/WatcherTest.php b/tests/WatcherTest.php
index a89bbc0..18c5867 100644
--- a/tests/WatcherTest.php
+++ b/tests/WatcherTest.php
@@ -45,7 +45,7 @@ class WatcherTest extends TestCase {
 	/** @var Watcher */
 	private $watcher;
 
-	public function setUp() {
+	public function setUp(): void {
 		parent::setUp();
 
 		$this->connection = \OC::$server->getDatabaseConnection();