How to Erase Encrypted Backup HD

[ghsDUDE]

Hi -

I'm trying to erase my backup HDD I was using with Time Machine and it was encrypted...every time I go to erase it in Disk Utility I get the following error message.

Any idea on how I can erase this thing properly so I can partition?

Thanks

 

[Weaselboy]

https://forums.macrumors.com/threads/how-to-delete-erase-an-encrypted-partition.1770622/

Try the instructions in my post from this thread.

 

[KALLT]

Make sure that the disk is not being accessed anywhere, e.g. not in Finder or a Terminal window. Just close these windows. If that does not work, eject the disk and try it again.

 

[JohnDS]

Launch Disk Utility to erase the volume. However, before erasing, you need to select the disk and then choose File > Unlock “volume name”