Cloud-based backup services (e.g., Google Drive, OneDrive, Dropbox). 2. External hard drives or network-attached storage (NAS) devices. 3. Built-in backup tools (e.g., Windows Backup, Time Machine for macOS). 4. Third-party backup software (e.g., Acronis True Image, EaseUS Todo Backup). 5. Regularly scheduled automatic backups to ensure data is consistently protected.