Moving Content from Galaxy S7 to iPhone X Apple Move to iOS app really sucks. It is only available to transfer a few items from Android to iPhone and you have to factory reset iPhone to bring up the app.

So my question is: what is the fastest way to transfer 60G content, including Contacts, WhatsApp, Music and Photos.
Apple Move to iOS app really sucks. It is only available to transfer a
  few items from Android to iPhone and you have to factory reset iPhone
  to bring up the app.
  
  So my question is: what is the fastest way to transfer 60G content,
  including Contacts, WhatsApp, Music and Photos.


Apple’s made it easy for Android folk to move all of their data from their Galaxy  HTC, or Lenovo phone, etc. i konw some ways:

For contacts: Apple’s official mail app supports iCloud, Microsoft exchange, Gmail, Yahoo,  so if you use one of those services, linking up your email account is pretty straightforward. Source.

For photos, videos.
Apple suggests you use PhotoSync ($3, iOS and Android). You’ll find those freshly synced photos in the Photos app in Albums. You can also move photos and videos with a computer. Download Android File Transfer then go to Transfer > DCIM > Camera to drag the images from your device to a folder on your computer.(source)

For messages.. sorry, i dind't know.. if you found great way to transfer messages from phone to another phone, please let us know.