Can't delete copied Time Machine files I'm trying to move my time machine backup files all under Backups.backupdb to another drive. I initiated a file copy overnight. In the morning I saw that only certain backups(folders with dates) got copied over. I then tried to copy over the ones that didn't get copied...but the OS wouldn't allow me to do that. I got and error that "The operation can’t be completed because backup items can’t be modified."

So then I though, ok. I'll delete the incomplete copy from my new drive and then try to start a whole new copy.

I started the delete and it prepared all night (I can see it counting all the files in the delete dialogue box). HOWEVER, in the morning I saw the error "The operation can't be completed because unexpected error occurred (error code -8003).

I tried to search online for info about it and can't seem to find anything.

I also tried to hold down the OPTION key while emptying the trash and that didn't work.
Holding down SHIFT+OPTION while emptying got me the -8003 error right away...I didn't have to wait for it to count all the files.

What is going on? How can I delete these files? I don't want to format my drive because it has other files on their that took a LONG time to copy.
I went through this just last week.  Time Machine backups have ACL permissions set.  There are a few ways to see these.  The first is ls -e.  This is from my TimeMachine .bash_profile

ls -le .bash_profile  
-rw-r--r--@ 5 gregcain  staff  6508 Mar 21 13:57 .bash_profile  
 0: group:everyone deny write,delete,append,writeattr,writeextattr,chown  


and this is for my normal one

ls -le .bash_profile  
-rw-r--r--  1 gregcain  staff  6748 Mar 29 13:08 .bash_profile  


If you want to modify these settings, you'll need chmod:

chmod -N .bash_profile