Moving chapters all at once is TERRIFYING.
Just that moment when you’ve cut one chapter, and it’s hanging in word processing limbo before you paste it into its new location — WHAT IF. What if someone bumps your hand and it vanishes forever?
Coupled with the terror of change — the TERROR OF CHANGING THINGS.
No wonder writers drink.
spell-sword.com 
Backup, backup, backup.
I once lost 200 pages of Rebuilt…. Back that stuff up!
Ha, it’s all safe on multiple versions in Google Drive — but it was still a little nerve-wracking.