Use the built-in
HTC Backup to back up your accounts, settings, contacts stored on your phone, text messages, and more to the cloud so that it will be easier to restore them on
HTC Desire 830 dual sim (after a factory reset) or newer phone.
HTC Sync Manager to import music, photos, and videos from
HTC Desire 830 dual sim to your computer. You can also sync locally stored contacts, calendar events, bookmarks, and playlists between
HTC Desire 830 dual sim and your computer.
HTC Sync Manager is a good alternative if you don't want to back up your accounts, settings, and other personal content to the cloud. You can use it to create backups of
HTC Desire 830 dual sim on your computer.
If you want, you can separately back up your data or files.