Hey,
You need to perform Storage Migration of your VMs. Should help: https://cloudcomputing.help/kb/how-to-perform-storage-migration-in-a-hyper-v-failover-cluster/?expand_article=1
Check all the files of the VM and migrate them to a new shared storage.
In addition, you can use local storage to create replicated shared storage for the cluster with StarWind VSAN.
https://www.starwindsoftware.com/vsan
Cheers,
Alex Bykovskyi
StarWind Software
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