System occupy the whole storage of sd card

[uranus0206]

I use pi imager flash openfyde os to a 64GB sd card in raspberry pi os.

Then i reboot device with openfyde os. And try to enable linux environment.

But system told me that i do not have enough space (less than 3GB).

Then i checked storage, i found system has occupied 61.8 GB. And it seems not reasonable.

What i can do to release the space which used by system?