Deleting Seagate backups from iMac trash
I have an iMac running High Sierra 10.13.6 and uses 967GB/1T and a Seagate Back Up Plus running 940GB/1T. I want to clean house on both, then upgrade to Monterrey. I am unable to delete directly from the Seagate disk, the only option is move to trash. Once in trash, and when attempting to empty trash, I get the message, “ the operation can’t be completed because the item “Library” is still in use” . If I “skip” this then I get the same message with “System” and “ibexce “etc. If I try get the folders out of the trash by moving back to the desktop, they do not remove from trash (as a document would). How do I resolve this issue?
iMac 27″ 5K, macOS 10.13