Unknown PVCs take up lot of space

Hi y’all, here is the situation I’m in:

I have Loki deployed on my k8s cluster, 3 replicas a gateway, and the minio backend subchart. My issue is that the minio subchart created at least two pvcs called export-0-loki-minio-0 and I looked at it on the node, and it takes up 350G. Due to the way my storage provisioner is configured, it did not matter that I set the PVC to 5G.

My question is, what are these things, and why do they take up so much space? i did not find anything related to it.