Nikon Z 50 Reference Manual page 219

Select Folder by Number
To select folders by number or create a new folder with the
current folder name and a new folder number:
1
Choose Select folder by number.
Highlight Select folder by number and press 2.
2
Choose a folder number.
Press 4 or 2 to highlight digits and
press 1 or 3 to change. If a folder
with the selected number already
exists, one of the following icons will
be displayed:
• W: Folder is empty.
• X: Folder is partially full.
• Y: Folder contains 5000 pictures or a picture numbered
9999. No further pictures can be stored in this folder.
3
Save changes and exit.
Press J to complete the operation and return to the main
menu (to exit without changing the storage folder, press the
G button). If a folder with the specified number does not
already exist, a new folder will be created. Subsequent
photographs will be stored in the selected folder unless it is
already full.
Menu Guide > C The Photo Shooting Menu
191