Respect the server resources. Don't try to import 100GB onto a $10/month Raspberry Pi server. Invest in a decent VPS (DigitalOcean, Vultr, or Linode), use the Google Drive addon, and let AIOWPM do the heavy lifting.
Here is exactly how to handle 100GB migrations safely, efficiently, and without the dreaded "Import Failed" screen. all-in-one wp migration 100gb
If you are moving to a specific host (e.g., SiteGround, Kinsta, WP Engine), use their proprietary migration plugins. Respect the server resources
How to Use All-in-One WP Migration (Beginner's Guide) - SupportHost Here is exactly how to handle 100GB migrations
For a site this size, the most stable and supported method is the Unlimited Extension Approximately for a lifetime or annual license (prices vary by plan). Why it's needed: It removes all import size limits and enables CLI (Command Line Interface)
The free version of All-in-One WP Migration has a file upload size limit (typically 512MB).