【11-17 大神请进】进入recovery后，没有backup and restore

Android system recovery<3e>
Volume up/down to move highlight;
power button to select.
reboot system now
apply update from external storage
wipe data/factory reset
wipe cache partition
apply updata from cache
（出现如上的文字，我该怎么选择，想备份系统，求大神指点迷津）