diff --git a/cron_delete_mp4.sh b/cron_delete_mp4.sh
new file mode 100644
index 0000000..1a04e16
--- /dev/null
+++ b/cron_delete_mp4.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# 设置文件保留时间为2天
+DAYS=2
+
+# 使用find命令查找所有符合条件的文件
+find /home/pi/mp4 -type f -mtime +$DAYS -exec rm -f {} \;
+
diff --git a/delete_than.sh b/delete_than.sh
new file mode 100644
index 0000000..8a8c1c9
--- /dev/null
+++ b/delete_than.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+set -e
+# 指定文件夹路径
+folder="/home/pi/mp4"
+
+# 获取文件夹的大小
+size=$(du -sh "$folder" | awk '{print int($1/1024/1024)}')
+while [[ $size -gt 22 ]]
+do
+  # 获取最早创建的文件
+  oldest_file=$(ls -tr | head -1 | xargs)
+  rm -f $oldest_file
+  size=$(du -sh "$folder" | awk '{print int($1/1024/1024)}')
+  if [[ $size -le 22 ]]
+  then
+    exit 0
+  fi
+done
\ No newline at end of file