diff --git a/lib/Model/FileCacheWrapper.php b/lib/Model/FileCacheWrapper.php
index 271b9fa00..7e071bf33 100644
--- a/lib/Model/FileCacheWrapper.php
+++ b/lib/Model/FileCacheWrapper.php
@@ -31,13 +31,13 @@
 
 namespace OCA\Circles\Model;
 
+use JsonSerializable;
+use OCA\Circles\Db\CoreQueryBuilder;
+use OCA\Circles\Exceptions\FileCacheNotFoundException;
 use OCA\Circles\Tools\Db\IQueryRow;
 use OCA\Circles\Tools\Exceptions\InvalidItemException;
 use OCA\Circles\Tools\IDeserializable;
 use OCA\Circles\Tools\Traits\TArrayTools;
-use JsonSerializable;
-use OCA\Circles\Db\CoreQueryBuilder;
-use OCA\Circles\Exceptions\FileCacheNotFoundException;
 
 /**
  * Class FileCacheWrapper
@@ -451,12 +451,19 @@ public function toCache(): array {
 	 * @return bool
 	 */
 	public function isAccessible(): bool {
-		if ($this->getId() === 0 || $this->getPath() === '') {
+		if ($this->getId() === 0) {
 			return false;
 		}
 
-		return !(explode('/', $this->getPath(), 2)[0] !== 'files'
-				 && explode(':', $this->getStorage(), 2)[0] === 'home');
+		$path = $this->getPath();
+		[$storageType,] = explode('::', $this->getStorage(), 2);
+
+		if ($path === '') {
+			// we only accept empty path on external storage
+			return (in_array($storageType, ['local', 'webdav', 'ftp', 'sftp', 'swift', 'smb', 'amazon']));
+		}
+
+		return !(explode('/', $path, 2)[0] !== 'files' && $storageType === 'home');
 	}
 
 
diff --git a/lib/ShareByCircleProvider.php b/lib/ShareByCircleProvider.php
index a1807fb01..48b564233 100644
--- a/lib/ShareByCircleProvider.php
+++ b/lib/ShareByCircleProvider.php
@@ -401,6 +401,11 @@ public function getSharesInFolder($userId, Folder $node, $reshares, $shallow = t
 			if ($wrappedShare->getFileCache()->isAccessible()) {
 				$result[$wrappedShare->getFileSource()][] =
 					$wrappedShare->getShare($this->rootFolder, $this->userManager, $this->urlGenerator);
+			} else {
+				$this->logger->debug('shared document is not available anymore', ['wrappedShare' => $wrappedShare]);
+				if ($wrappedShare->getFileCache()->getPath() === '') {
+					$this->logger->notice('share is not available while path is empty. might comes from an unsupported storage.', ['wrappedShare' => $wrappedShare]);
+				}
 			}
 		}