Please run a "checkdsk /f" operation to see if there are hardware drive issues as stated above.  Then try the restore process.

Other than that, I would copy the backup files...

I would build a sand box and try all these suggestions to see what works and what does not. ( trying older/newer DLLs, etc)

Good information from Jeff.   I would add to improve your disk system / LUNS, and network speed and reliability (good network topology is important).   Little things can help.  I have...

SQL server "Availability group" is not available in some versions of SQL server.

Yes, The phone number could be a PII.  So it should be a choice for the information provider.

If you can get a trial version of the data warehouse software, You should be able to see if it is the right tool.  You may consider looking at some...

SSIS handles the extract, transformation. and Load phases efficiently most of the time:

Extract : Initial data input.

Transformation: Data mapping / data conversion / data correction.

Load : Final data delivery : ...

A data warehouse stores current and historical data from one or more systems in a predefined and fixed schema, which allows business analysts and data scientists to easily analyze the...

Your statement:

A network-related or instance-specific error has occurred while establishing a connection to SQL Server. Server is not found or not accessible. Check if instance name is correct and if...

The redistributable installer for Microsoft ODBC Driver 18 for SQL Server installs the client components, which are required during run time to take advantage of newer SQL Server features (SSIS,...

I am not sure if this will help from another article I saw on internet.  Personally, I have seen this happened in large platforms.   I will definitely check your infrastructure...

Is the SQL process setup with the re-compile option (adding more time for execution)?    Yes, as the gentleman stated, please compare the execution plans could be different.   Please verify...

Interesting question.  Good answer.   Panel Dave has good articles on long running queries and query store SQL server features.

You may be looking at either OS permission issue or SQL server permission.  Have you checked the OS event viewer?

Please ensure you have the latest SQL server service pack and...

All good answers here.   I would add:

• There may be a possibility that the deprecated SQL server features could affect your application.   I would go with the latest version to...