retrieve data from nfs disk

Hello I've setup fetchmail to retrieve mail using pop3 for a 15 accounts and only I can do is to keep messages on server or download and remove from server. I want to keep mail on the server for 10 days or more : so other clients using same mail connecting directly to the server will be...

Hello I have some local disk and other disk in NFS on some server KVM in proxmox5. It's possible to detach an disk and have the posibility to retrieve data on it with another kvm server?