Canon PowerShot SX400 IS Black Manual (en)

Formatting Memory Cards
Before using a new memory card or a card formatted in another 
device, you should format the card with this camera.
Formatting erases all data on a memory card. Before formatting, 
copy images on the memory card to a computer, or take other 
steps to back them up.
An Eye-Fi card (
Before formatting an Eye-Fi card, install the software on a 
Access the [Format] screen.
Choose [Format], and then press 
the [
] button.
Choose [OK].
Press the [
] buttons to 
choose [Cancel], press the [ ][ ] 
buttons to choose [OK], and then 
press the [
] button.
Format the memory card.
To begin the formatting process, 
press the [
] buttons to 
choose [OK], and then press the 
] button.
When formatting is finished, 
[Memory card formatting complete] 
is displayed. Press the [
] button.