There is no "Convert back to Basic" button that works without wiping the drive. You will need third-party software (like EaseUS or MiniTool) to convert back, which often costs money and still risks data loss. If you have to ask whether you need a Dynamic Disk, you don't need a Dynamic Disk.
For most people, the safe advice is don’t click it . But that answer isn't very helpful if you're running out of drive letters or trying to set up a RAID array at home. convert to dynamic disk vs mbr
If you’ve ever right-clicked on a disk in Windows Disk Management, you’ve seen the ominous option: “Convert to Dynamic Disk.” There is no "Convert back to Basic" button
Use MBR for boot drives under 2TB. Use GPT for everything else. Leave Dynamic disks for legacy servers and tech historians. For most people, the safe advice is don’t click it