To encrypt all your files from Time Machine backups, you have to provide your backup password. If you no longer remember the backup password, you cannot restore or recover your data from the Time Machine backup. In such cases, configure the WD My Cloud Home Time Machine backup as Guest by performing the following steps.
On the home screen of your Mac computer, click the Apple logo at the top and choose the System Preferences option.
Search for the Time Machine option and click it.
Select the checkbox next to the ‘Show Time Machine in menu bar’ option.
Click the Time Machine icon at the top of the screen and select the ‘Open Time Machine Preferences’ option.
Click the ‘Select Disk’ button in the Time Machine window.