wsl disk compact

[zero2hj]

C:\Users\yanhj\AppData\Local\Packages\TheDebianProject.DebianGNULinux_76v4gfsz19hv4\LocalState\ext4.vhdx

run diskpart with popup new terminal of diskpart program

select vdisk file="C:\Users\yanhj\AppData\Local\Packages\TheDebianProject.DebianGNULinux_76v4gfsz19hv4\LocalState\ext4.vhdx"
attach vdisk readonly
compact vdisk
detach vdisk
exit

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compact 90G space from 170G to 80G