However, your phone will store up to the last 7 days worth of local backup files and Google Drive will only have the most recent one. If you wish to restore a local backup which is not the most recent one, you will need to do the following:
Download a file manager app.
Through the file manager app, navigate to SD Card/WhatsApp/Databases. If your data is not stored on the SD card, you may see “internal storage” or “main storage” instead of SD Card.
Rename the backup file you wish to restore from msgstore-YYYY-MM-DD.1.db.crypt12 to msgstore.db.crypt12.
It is possible that an earlier backup may be on an earlier protocol, such as crypt9 or crypt10. Do not change the number of the crypt extension.
Uninstall WhatsApp.
Again Install WhatsApp.
Tap to Restore at the time of re-installation.