cleanup backup files

resources/lang/en/label.php

@@ -68,6 +68,8 @@ return [
             'via_sftp_help' => 'Whether to save via FTP. If so, add the configuration information to the .env file, refer to <a href="https://laravel.com/docs/master/filesystem#sftp-driver-configuration">Laravel doc</a>',
             'export_path' => 'Export to directory',
             'export_path_help' => 'Not set to use the system temporary directory::default_path. you can use third-party specialized tools to transfer offsite saves.' ,
+            'retention_count' => 'Retention count',
+            'retention_count_help' => 'Retain only the latest backup records, old ones will be deleted regularly. Default: :default_count',
         ],
         'hr' => [
             'tab_header' => 'H&R',

resources/lang/zh_CN/label.php

@@ -68,6 +68,8 @@ return [
             'via_sftp_help' => '是否通过 SFTP 保存。如果通过，把配置信息添加到 .env 文件，参考 <a href="https://laravel.com/docs/master/filesystem#sftp-driver-configuration">Laravel 文档</a>',
             'export_path' => '导出到目录',
             'export_path_help' => '不设置使用系统临时目录：:default_path。可以使用第三方专业工具转移异地保存。',
+            'retention_count' => '保留数量',
+            'retention_count_help' => '只保留最新的备份记录，旧的会定时删除。默认：:default_count',
         ],
         'hr' => [
             'tab_header' => 'H&R',

resources/lang/zh_TW/label.php

@@ -68,6 +68,8 @@ return [
             'via_sftp_help' => '是否通過 SFTP 保存。如果通過，把配置信息添加到 .env 文件，參考 <a href="https://laravel.com/docs/master/filesystem#sftp-driver-configuration">Laravel 文檔</a>',
             'export_path' => '導出到目錄',
             'export_path_help' => '不設置使用系統臨時目錄：:default_path。可以使用第三方專業工具轉移異地保存。',
+            'retention_count' => '保留數量',
+            'retention_count_help' => '只保留最新的備份記錄，舊的會定時刪除。默認：:default_count',
         ],
         'hr' => [
             'tab_header' => 'H&R',