Deleting Backup files

How can I delete Norton 360 Vers 5 backup files from an external hard drive that has no access from a computer with Norton 360

 

 

How can I delete Norton 360 Vers 5 backup files from an external hard drive that has no access from a computer with Norton 360

 

 

Thanks for the suggestion but solved the problem just prior to reading your reply.

 

The files were corrupted and using 360 to delete it was taking 5 mins per file (backup was 270,000+ files LOL!).

 

I managed to delete the backup (over 40G in size) by disconnecting ALL computers with 360 installed from the network and connected a Laptop with no norton product which saw it as just a regular file and the normal "explorer" delete worked fine.

 

It just took three days of messing around to resolve the problem and now I have recovered the 40G+ from the external drive.