NOTE: To learn how you can back up app data, contacts, and media files on the HTC 10, you can visit this thread.

Restore App Data:

  1. Make sure the HTC phone is connected to an active Wi-Fi network
  2. Open the apps drawer
  3. Launch “Settings” and scroll to “Personal
  4. Tap “Backup and reset” > “Restore from HTC Backup
  5. Follow the on-screen instructions to select a backup account and complete the process

Restore Contacts from a Google Account:

  1. Open “Settings
  2. Under “Personal”, tap “Accounts & Sync
  3. If necessary, sign in with the Google account containing the backup
  4. Access the sync settings for your account and make sure “Contacts” is enabled
  5. Tap “Menu” > “Sync all

Restore Media Files from a Windows Computer:

  1. Connect the HTC 10 to your computer via USB
  2. At the prompt, enable “Media device (MTP)” / “File Transfer (MTP)”, otherwise enable the option in the “Notification” area
  3. Launch the File Explorer on the computer and locate the media file backups
  4. Copy the backups and transfer them on the phone storage (Preferably in the “Media” directory or the folder they originate from)
  5. After the transfer is done, eject the phone storage via system tray and disconnect it from the USB port

Restore Media Files from a Mac:

  1. Connect the HTC 10 to the Mac via USB
  2. Enable “Media device (MTP)” / “File Transfer (MTP)” at the prompt, otherwise enable the option from the “Notification” area
  3. Open the File Finder on the Mac and locate the media file backups on the computer storage
  4. Copy the files and transfer them back on the phone storage, preferably in the “Media” folder
  5. Once the transfer is done, drag the phone’s virtual drive from the desktop and drop it into the “trash can
  6. You can now safely disconnect the phone from the USB cord

See More: HTC 10: Restore App Data, Contacts, and Media Files