Thanks, Eduardo - I have deleted the duplicate thread/wish.
Urizzato - more specific to Eduardo's suggestions about permissions: are you trying to delete bpn files for projects that are currently open in AC? If so, exit AC first. If not, right click the bpn file, then Properties and see if the bpn is somehow marked as read-only. Or, are these files on a server perhaps?
Karl
One of the forum moderators
AC 28 USA and earlier • macOS Sonoma 14.7.1, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB