diff --git a/apps/files_external/lib/Lib/Backend/SMB.php b/apps/files_external/lib/Lib/Backend/SMB.php
index 5344bf5f78c20..764911b5f2879 100644
--- a/apps/files_external/lib/Lib/Backend/SMB.php
+++ b/apps/files_external/lib/Lib/Backend/SMB.php
@@ -60,6 +60,9 @@ public function __construct(IL10N $l, Password $legacyAuth) {
 					->setType(DefinitionParameter::VALUE_BOOLEAN)
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL)
 					->setTooltip($l->t("Check the ACL's of each file or folder inside a directory to filter out items where the user has no read permissions, comes with a performance penalty")),
+				(new DefinitionParameter('shared',$l->t('Shared storage')))
+					->setType(DefinitionParameter::VALUE_BOOLEAN)
+					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
 				(new DefinitionParameter('timeout', $l->t('Timeout')))
 					->setType(DefinitionParameter::VALUE_HIDDEN)
 					->setFlag(DefinitionParameter::FLAG_OPTIONAL),
diff --git a/apps/files_external/lib/Lib/Storage/SMB.php b/apps/files_external/lib/Lib/Storage/SMB.php
index ce37d55612993..c0fb540b90755 100644
--- a/apps/files_external/lib/Lib/Storage/SMB.php
+++ b/apps/files_external/lib/Lib/Storage/SMB.php
@@ -94,6 +94,9 @@ class SMB extends Common implements INotifyStorage {
 	/** @var bool */
 	protected $checkAcl;
 
+	/** @var bool */
+	protected $isSharedStorage;
+
 	public function __construct($params) {
 		if (!isset($params['host'])) {
 			throw new \Exception('Invalid configuration, no host provided');
@@ -131,6 +134,7 @@ public function __construct($params) {
 
 		$this->showHidden = isset($params['show_hidden']) && $params['show_hidden'];
 		$this->checkAcl = isset($params['check_acl']) && $params['check_acl'];
+		$this->isSharedStorage = isset($params['shared']) && $params['shared'];
 
 		$this->statCache = new CappedMemoryCache();
 		parent::__construct($params);
@@ -153,6 +157,12 @@ public function getId() {
 		// FIXME: double slash to keep compatible with the old storage ids,
 		// failure to do so will lead to creation of a new storage id and
 		// loss of shares from the storage
+		
+		// If this is shared storage, generate the same file IDs for all users
+		if ($this->isSharedStorage) {
+			return 'smb::' . $this->server->getHost() . '//' . $this->share->getName() . '/' . $this->root;
+		}
+		
 		return 'smb::' . $this->server->getAuth()->getUsername() . '@' . $this->server->getHost() . '//' . $this->share->getName() . '/' . $this->root;
 	}
 
diff --git a/apps/files_external/tests/Storage/SmbTest.php b/apps/files_external/tests/Storage/SmbTest.php
index 2e2983dad1b50..778594e0cdbdc 100644
--- a/apps/files_external/tests/Storage/SmbTest.php
+++ b/apps/files_external/tests/Storage/SmbTest.php
@@ -96,6 +96,19 @@ public function testStorageId() {
 		$this->instance = null;
 	}
 
+	public function testSharedStorageId() {
+		$this->instance = new SMB([
+			'host' => 'testhost',
+			'user' => 'testuser',
+			'password' => 'somepass',
+			'share' => 'someshare',
+			'root' => 'someroot',
+			'shared' => true
+		]);
+		$this->assertEquals('smb::testhost//someshare//someroot/', $this->instance->getId());
+		$this->instance = null;
+	}
+
 	public function testNotifyGetChanges() {
 		$notifyHandler = $this->instance->notify('');
 		sleep(1); //give time for the notify to start