Default [Q] problem copying via adb

I was attempting to copy cnexus' Stock rooted rom for my gs3, but adb failed and said the file permissions were read only; when I check the permission status with root explorer it shows the permissions as rwx across the board. Does anyone have a suggestion to remedy this? My only other option would be to copy them to the external sd, then copy to \sdcard using root browser. Unfortunately there is no way for me to mount the phone in mass storage mode and just use windows explorer, and Kies doesn't connect to the phone(not my favorite program anyway) Thanks in advance