I was having a hard time solving the problem and this solution worked for me
- install physical storage device manger:sudo apt-get install pysdm
- open storage device manger:sudo pysdm
- choose your required drives
- press assisst:
- uncheck open as read only
- check owner user of file systemand write your username:remon
- press ok
- press apply
- umount Drive
- mount it
Note: if you can't change files to binary executables, go to special files and check permit execution of files as binaries, and go to step 7