diff --git a/jetlinks-components/io-component/src/main/java/org/jetlinks/community/io/file/ClusterFileManager.java b/jetlinks-components/io-component/src/main/java/org/jetlinks/community/io/file/ClusterFileManager.java
index 4e3e48b6f..1de2394f4 100644
--- a/jetlinks-components/io-component/src/main/java/org/jetlinks/community/io/file/ClusterFileManager.java
+++ b/jetlinks-components/io-component/src/main/java/org/jetlinks/community/io/file/ClusterFileManager.java
@@ -1,5 +1,6 @@
 package org.jetlinks.community.io.file;
 
+import com.alibaba.excel.util.StringUtils;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufAllocator;
 import io.netty.buffer.ByteBufUtil;
@@ -24,6 +25,7 @@
 import org.springframework.http.codec.multipart.FilePart;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
+import reactor.core.scheduler.Schedulers;
 
 import java.io.File;
 import java.nio.file.NoSuchFileException;
@@ -168,6 +170,9 @@ public Mono<FileInfo> saveFile(String name, Flux<DataBuffer> stream, FileOption.
 
     @Override
     public Mono<FileInfo> saveFile(String name, String folder, Flux<DataBuffer> stream, FileOption... options) {
+        if (folder.contains("/")) {
+            return Mono.error(new BusinessException("error.folder_cannot_contains:/"));
+        }
         return doSaveFile(name, folder, stream, options);
     }
 
@@ -277,6 +282,7 @@ public void handleDeleteEvent(EntityDeletedEvent<FileEntity> event) {
                 .map(entity -> Paths.get(properties.getStorageBasePath(), entity.getStoragePath()).toFile())
                 .filter(File::exists)
                 .map(File::delete)
+                .subscribeOn(Schedulers.boundedElastic())
         );
     }
 
diff --git a/jetlinks-components/io-component/src/main/java/org/jetlinks/community/io/file/web/FileManagerController.java b/jetlinks-components/io-component/src/main/java/org/jetlinks/community/io/file/web/FileManagerController.java
index b4e7bd892..fbe96977c 100644
--- a/jetlinks-components/io-component/src/main/java/org/jetlinks/community/io/file/web/FileManagerController.java
+++ b/jetlinks-components/io-component/src/main/java/org/jetlinks/community/io/file/web/FileManagerController.java
@@ -81,7 +81,7 @@ public Mono<Void> read(@PathVariable String fileId,
                                            .getHeaders()
                                            .getRange();
                                        long position = 0;
-                                       if (ranges.size() != 0) {
+                                       if (!ranges.isEmpty()) {
                                            position = ranges.get(0).getRangeStart(ctx.info().getLength());
                                        }
                                        ctx.position(position);