diff --git a/saveEbs.sh b/saveEbs.sh
new file mode 100644
index 0000000..a8b5da5
--- /dev/null
+++ b/saveEbs.sh
@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# 获取所有可用的 region
+regions=$(aws ec2 describe-regions --query 'Regions[*].RegionName' --output text)
+# regions=ap-south-1
+
+for region in $regions; do
+    echo "=== Processing region: $region ==="
+
+    # 获取当前 region 的实例 ID 列表
+    instance_ids=$(aws ec2 describe-instances \
+        --region $region \
+        --query 'Reservations[*].Instances[*].InstanceId' \
+        --output text)
+
+    for instance_id in $instance_ids; do
+        echo "---- Instance: $instance_id ----"
+
+        # 获取该实例的全部 EBS block device mapping
+        devices=$(aws ec2 describe-instances \
+            --region $region \
+            --instance-ids $instance_id \
+            --query 'Reservations[0].Instances[0].BlockDeviceMappings[*].DeviceName' \
+            --output text)
+
+        for device in $devices; do
+            echo "Setting DeleteOnTermination=false for $instance_id ($device)"
+
+            # 创建临时 JSON 文件
+            tmpfile=$(mktemp)
+
+            cat > $tmpfile <<EOF
+[
+  {
+    "DeviceName": "$device",
+    "Ebs": {
+      "DeleteOnTermination": false
+    }
+  }
+]
+EOF
+
+            # 修改属性
+            aws ec2 modify-instance-attribute \
+                --region $region \
+                --instance-id $instance_id \
+                --block-device-mappings file://$tmpfile
+
+            rm -f $tmpfile
+        done
+    done
+done
+
+echo "All instances processed."
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