A system for storing a file system can include writing a file system to a memory device, the file system including a plurality of files, a subset engine to determine a subset of the plurality of files, a marking engine to mark each file of the plurality of files that is not included in the subset as a not-for-use sector, a crosslinking engine to crosslink duplicate files of the subset, a compression engine to compress a directory structure and a file allocation table (FAT) associated with the subset; and a storing engine to store the compressed directory structure and FAT in the file system.