Canon EOS-1D X Mark II DSLR Camera (Body Only) - Manual (Page 201)

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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.
1
Select [Record func+card/folder
sel.].
Under the [ 5 1 ] tab, select [ Record
func+card/folder sel. ], then press
< 0 >.
2
Select [Folder].
3
Select [Create folder].
4
Select [OK].
X A new folder with the folder number
increased by one is created.
3
Creating and Selecting a Folder
Creating a Folder