Recently went from 128g to new 64g X... Problem is I had 100g of info on phone and 200g of iCloud space.... was trying to synch for a day plus so I turned it off now its just black screen with the logo?
iPhone X, iOS 11.2.1
Perhaps one this article will help:
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
You may have to reset your iPhone as a new device:
Restore your iPhone, iPad, or iPod to factory settings - Apple Support
If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support
Storage and synching phone
