Canon EOS Rebel SL3 DSLR Camera with 18-55mm Lens (Black) - Manual (Page 263)

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Creating and Selecting a Folder
You can freely create and select the folder where the captured images are
to be saved.
This operation is optional since a folder will be created automatically for
saving captured images.
Creating a Folder
1
Select [Select folder].
z Under the [ 5 ] tab, select [Select
folder] , then press < 0 >.
2
Select [Create folder].
z Select [Create folder] , then press
< 0 >.
3
Create a new folder.
z Select [OK] , then press < 0 >.
B A new folder with the folder number
increased by one is created.