We have an automated job that backs up our DNN file system every morning.
Just recently it has been failing every morning due to problems with files in the Portals/_Default/cache directory.
The files are obviously being accessed, created and deleted while the backup is running anc this causes the failure.
Unfortunately the site is run 24x7 so we don't have any downtime in order to carry out this back-up.
I am sure that we can't be the only ones with this problem, so how do you guys cope with this?