Why should I verify my company file after transferring it?

https://quickbookhelpdesk.com/blog/transfer-quickbooks-new-computer/

Checking your company file ensures that customer records, financial data, payroll information, reports, and transactions were transferred successfully. Transferring QuickBooks to a new computer is a straightforward process when you prepare carefully and protect your company data. Most transfer issues are caused by incomplete backups, outdated software, missing company files, permission problems, or temporary system issues rather than permanent data loss.