About intel PSM(excerpt)

Persistent storage is supported in the Windows CE OS via the FAT file system and installable file systems.Support for the FAT File system was added just before the release of version 1.0.As the application base for the OS has grown,the need for new capabilities also grew.Thus,support for installable file system was added in release 2.10.Much of the support for persistent storage shipping in current version of Microsoft development kits is oriented around removable storage cards.Third party products,like Persistent Storage Manager,are now available that allow the use of built-in flash for persistent storage.