Don’t copy files with windows explorer or other windows tools, alway use krc HMI. Or do a boot of the system without starting kuka system (i.e. pressing shift on a real keyboard (not kcp) at the cold start of windows, then you can copy files with windows explorer.
Don’t create backup files in subfolders of R1, copy them to a separate folder under C:\ or D:\. All folders under R1 will be copied at bootup of the robot system into the vxworks system of the robot. If you have files with same global variables this will lead to many failures and confusion.