How to say "folder" in Japanese

• ディレクトリCommon
  nounCovers the computing sense of 'folder': a directory in a file system. Common in technical contexts and everyday computer talk, this is a dependable choice when talking about where files are stored.
• フォルダ
  nounAlso refers to the computing sense of 'folder'. A direct loanword, it is understood but listed as less common than ディレクトリ, so it is a secondary option rather than the first word to reach for.
  そのフォルダ、共有きょうゆうにしておいて。↗

  Make that a shared folder.
• 折り畳み機おりたたみき
  nounRefers to a physical folder — a machine that folds paper, as in printing or binding work. For the computing sense this is not the word you want at all; it belongs to office machinery contexts.

For computer folders, use 「ディレクトリ」 or 「フォルダ」 (「フォルダ」 being less common); for a physical machine that folds paper, 「折り畳み機」 is the word you want.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• ディレクトリdirectory
• フォルダfolder
• 折り畳み機おりたたみきfolding machine