Final answer:
Backup plans for mobile devices frequently utilize cloud services for automatic data backups, while personal computers may use both cloud services and physical external hard drives, especially for larger files and more sensitive data.
Step-by-step explanation:
Backup plans for mobile devices and personal computers can differ based on several factors such as storage capacity, security, frequency of backups, and the methods used to perform these backups. While mobile devices often use cloud services to automatically back up data like photos, contacts, and app data, personal computers may utilize a combination of cloud-based solutions and physical storage devices like external hard drives. The latter is particularly useful for large files or sensitive information that requires additional security measures. Moreover, personal computers may include backup of system settings and application data, which are more complex to restore compared to mobile device backups. Regular and automatic backups are instrumental in business environments where data loss can have significant impacts on operations, customers, and revenues.