Backup files contain garbled file names. Steven Chan July 19, 2017 10:53 Updated Follow If you are using Windows and you have non-English document names, the unzip process may not be able to read the file names correctly. You can also try using Zipeg instead. Related articles Auto-backup create multiple files in Google Drive. Deleted files remain in the sync folder. Some files are missing in the auto-backup folder. Error message shows up stating "Failed to open document" How to transfer GoodNotes data to a new device?