Disk Management can fail to open because of a service problem, damaged system files, MMC console issues, or a stuck storage device. You can still inspect disks with another tool.

If Disk Management freezes when a specific drive is connected, the drive may be failing. Recover files before formatting or initializing it.
If Disk Management keeps freezing, use Qiling Disk Master to check the disk layout first. Do not initialize, format, or delete a suspicious disk before copying or recovering important files.
Launch Qiling Disk Master and check whether all internal and external disks appear. Note the disk number, capacity, partition style, and any partition marked as unformatted or RAW.

If Disk Management failed only when a certain USB or external disk was connected, select that disk and check whether it shows bad sectors, RAW file system, or an abnormal capacity.
If the problem disk contains important files, copy them out or run data recovery before any format or initialization. A drive that freezes Disk Management may be failing.
After files are safe, choose the correct action: create a partition on unallocated space, format a RAW partition, change a drive letter, or delete an unwanted partition. Review the preview before clicking Proceed.

If Disk Management does not open, fix Windows services and MMC first. If a specific drive causes the freeze, protect its files before you format, initialize, or repair it.