My NVMe says it’s unhealthy, but it’s only 6% used. What should I do?

Those figures measure different things. “Percentage used” estimates consumed endurance, not the chance that the drive is healthy. A critical warning can indicate a serious fault even when the wear estimate is low. With media errors and a missing boot drive, treat this as a failing drive: copy important files if it is still readable, avoid unnecessary writes, and contact the drive or laptop vendor about replacement.

Check the critical-warning bits and the NVMe error log for more detail, but don’t let further diagnostics delay protecting your data. If the files matter and the drive is intermittently readable, copying them to another device is safer than trying repairs or reinstalling the operating system. A low wear percentage does not rule out a controller or other hardware failure.

First confirm the drive is consistently detected in firmware and in the live system, and make sure the report is for the correct NVMe device. Reseating the SSD may be worth considering if you are comfortable opening the laptop, but a critical warning plus media errors is not something I’d dismiss as a bootloader problem. Back up what you can, then pursue warranty support.