WordPress migrations can fail for many reasons: file size limits, PHP timeouts, memory limits, server restrictions or plugin conflicts. When All-in-One WP Migration stops progressing, the issue is usually environmental rather than the backup itself.
Common causes
The most common causes are low upload limits, insufficient memory, slow shared hosting, security rules, browser interruptions and not enough disk space.
What to check first
Confirm the backup file size, available disk space and PHP limits. Then check server error logs and browser console errors during the import.
Practical fixes
Increase upload and execution limits, disable nonessential plugins during the restore, use a fresh WordPress installation and import from a stable network connection.
When to switch methods
If the import still fails, perform a manual migration: copy files, import the database, update URLs and flush permalinks. Manual migrations are often more reliable for large sites.