Sony XPERIA XZ User Manual page 12

10
Formatting SD Card
When using a new SD Card for the first time, always format it
on handset.
・Formatting erases all data on SD Card. Carefully check any
SD Card that was used on another device before formatting.
・Charge Battery while formatting, or format with adequate
battery charge.
In Home Screen, (Apps)
Storage & memory
Advanced
Storage SD Card
(Settings)
Settings
Format ERASE & FORMAT
All data on SD Card is erased.