How can I change mbr to gpt without data loss?

Great question! From my own experience, changing MBR to GPT — especially if you're doing it with third-party tools or manually — can be a bit risky if you're not super careful. In real life, I’ve seen folks lose data or run into boot issues because they didn’t back up first or because the conversion process went wrong. Even with trusted tools, things can sometimes get messy if there's a power outage, hardware failure, or if the disk has bad sectors.

My advice

• Always backup everything important first. Like, really, do it. External drive, cloud, just do it.
• Make sure your system is stable — no power interruptions during the process.
• Double-check that your hardware supports UEFI boot mode if you want to boot from GPT.

In the end, how to change MBR to GPT, if you're cautious and prepared, the risk is manageable. But if you’re not experienced or don’t want to take chances, maybe get a professional involved or stick with official tools.