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管理安装到SD卡的3DS软件时,内核读取[[Title Database|title.db]],接收[[Application Manager Services PXI|AM]]命令。AM从title.db文件获得已安装的title,title大小和每个title的CMD文件的名称,cmd文件是用来检查title数据真实性的(产品代码,title版本,并得到一个列表。 and if an electronic manaual is used, is also kept for each title, in the title.db, but won't be used by the Data Management Utility). 对于列出的每个title,它都会通过CMD文件检查title签名。如果title通过了签名认证,Data Management 从可执行的NCCH([[CXI]])中 解密/读取 ICN 数据并显示title占用的存储空间大小。如果title没有通过签名认证,会显示占位图标(浅灰色背景的'?'), 名称('????????') 以及占用的存储空间为零. 删除titles会从title.db and import.db中移除title数据, 并删除对应文件夹。