Device encryption can lead to being locked out of a computer, making it crucial to back up the recovery key in advance. Users with local accounts must ensure they have this key, while those with Microsoft accounts can retrieve it later. Windows 10 and 11 Home editions may automatically encrypt the hard drive. To access the recovery key, users should sign in to their Microsoft account online and note the key ID and recovery key. Multiple devices linked to the same account will be listed online, complicating key retrieval. Each encrypted partition requires a separate recovery key. The OSV refers to the system drive, and FDV refers to other data drives. Without a Microsoft account, users cannot access an online backup of the recovery key, and the Home Edition lacks options for saving the key compared to the Pro version.