360 backup - delete files in the windows explorer

Dear friends

 

I´ve made a backup of about 120.000 files in Norton 360 BACKUP. (Windoes 8.1)

 

After this I deleted in NORTON 360 BACKUP program only the backup process name, because i won´t do this backup again, but the backup files remained in the hard disc on norton backup directory

 

To save space in my hard disc, I decided now to remove the files in norton backup directory in the HD. I can´t remove them directly in Norton backup 360 program because as I said I remove it of the program, so I have to go to Windows Explorer to remove inside it the files

 

I selected the directory/files to be deleted, but for my surprise the deleting speed is too low (each 1 file deleting at about 30-60 seconds). Considering 120.000 files, tghe estimatec time to delete all the files is 83 days !!!

 

I contacted Norton chat and they informed me that it´s normal this speed when deleting Norton backup files inside Windows Explorer

 

Can anyone help me on how to delete these files faster?