Sony Xperia XZ1 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 Internal Battery while formatting, or format with
adequate battery charge.
In Home Screen, (Apps)
(Settings)
Storage
SD card
Storage settings
Format
ERASE & FORMAT
DONE
All data on SD Card is erased.