If you unlock the bootloader can put CWM and TWRP recowery.
Owners "XT905" do a full backup using CWM or TWRP recowery. (Boot cache data recovery system)
If you do not want your data that used to hit me. You can do:
1. Make a backup of cache, data.
2. Make a Wipe Data / cache
3. Make a backup...