Before I set up an Easystore HD with Time Machine, I tried to erase the HD using Disk Utility (format: Mac OS Extended- Journaled). But the message said “Erase process has failed. Unmounting disk. MediaKit reported not enough space on device for requested operation. Operation failed” . Oddly the the hard drive is a brand new and has 4TB empty space! Help!
You should try to refer this KBA for this concern.