With　the　popularity　of　mobile　devices,　especially　Android　devices,　digital　forensics　have　become　a　hot　issue.　In　digital　forensics,　data　recoverability　is　one　of　the　most　important　problems　and　has　drawn　increasingly　more　attention.　This　is　because　data　may　contain　the　information　about　important　events,　making　it　indispensable　digital　evidence.　In　this　paper,　according　to　some　special　characteristics　of　YAFFS2,　we　discuss　the　possibility　of　recovering　multiple　versions　of　YAFFS2　files　and　then　propose　a　method　to　recover　multiple　versions　of　YAFFS2　files.　To　verify　the　effectiveness　of　our　proposed　method,　we　perform　some　experiments　to　show　that　our　method　is　more　effective　on　the　recovery　of　multiple　versions　of　files　than　some　other　existing　methods.