Question Mounting to Computer

Wondering if anyone can help me out asap, when mounting to a computer I am unable to see system files and folders that begin with a period. I am rooted and on MF3, I find it weird since I never had this issue with my HTC phones.. I even tried mounting the system on the phone as R/W and still wouldn't work. Need to get this done asap so I can make some file backups and get on with upgrading. Thank you.