Huawei MATE 9 Use Manual page 91

Backing up data to your phone's internal storage
Back up data to your phone's internal storage to avoid losing your files. Only back up smaller
files, such as your contacts, messages, call logs, and calendar.
1
Open Backup.
2
Touch Backup > Internal storage > Next.
3
Select the data you want to back up and touch Back up. When prompted, enter a backup
password. No backup password is required for photos, audio files, videos, or documents.
Set a password reminder to ensure you don't lose access to your files.
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By default, backup files are saved to the HuaweiBackup folder in Files.
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Security and Backup
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