If you want to save a conversation you would have to do so manually, which mitigates risks. Download the Windows version of Viber for Desktop Click on the file once it has finished downloading (at the bottom of your screen) Viber will open: click Install and follow the instructions. To scan it, you must open the Viber application on your mobile. Keeping the Auto Backup option off is then the safest option. By pressing the button you will be redirected to a login page of QR code. It might also be possible for law enforcement to access it which is not the case with the conversation on your phone. This setting is a potential threat to your privacy as anyone that would potentially get access to your Apple, Google or Huaweii account, could also access all of your conversations. Viber offers the possibility of backing up your chat history using cloud services (Google Drive, iCloud or Huaweii Drive) so that you can restore your session to how it was at the time of the backup, if using a new device. This also means that if you lose or change the device you are using, all your messages will be lost. Viber is end to end encrypted, which means that messages are only acessible by both the sender and the receiver, not being stored anywhere along the way. Tap the three dots on the bottom right corner of the screen.To access the settings discussed here, on the Viber app:

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