Sources
Technology interfaces change frequently, so device-specific procedures should always be checked against current manufacturer or service-provider support.
Microsoft Support
Tips to improve PC performance in Windows is used as a current Windows performance reference.
Google Android Help
Android backup and restore guidance explains current Google-account device backup and notes that not every app can restore every setting or data type.
Apple Support
iPhone and iPad iCloud backup guidance and Apple's restore documentation provide current device-specific backup references.
CISA
Multifactor authentication guidance supports the account-security material.
Product and service providers
For routers, cloud services, browsers, apps and hardware, use the current support documentation for the exact product. Screens, menu labels and available features can change after updates.