Complex sentence: KeePass stores usernames, passwords, and other fields, including free-form notes and file attachments, in an encrypted file, protected by a master password, key file, and/or the current Windows account details.
Split into simpler sentences: KeePass stores usernames, passwords, and other fields, including free-form notes and file attachments, in an encrypted file. This file can be protected by a master password, key file, and/or the current Windows account details.