For added security, Windows 11 will forgo the older MBR partition scheme and use GPT instead. That may require users to convert their older hard drives. Here is how to do it.

The recommended method to convert these disks is to upgrade the operating system to Windows 10 first, then perform the MBR to GPT conversion. So 2k8 sounds like a no no even for an offline conversion.

This post explains what is MBR (Master Boot Record), GPT (GUID Partition Table) and which technology is better for your SSD.

The newer (GPT) standard solves some limitations of the older (MBR) standard. Here's how to tell which standard your drive uses.