Expanding Folders
Pocket count is the first decision and it should match a system you already use — twelve for months, twenty-six for alphabetical, five or six for a small project split. More pockets than you need makes the folder harder to search, not easier. The second is closure: elastic and flap suits a folder that travels, while an open concertina is faster for a folder that lives on a desk. See document wallets for single-set carrying.
