Titanium Backup - enable write access to external SD Card

Recently I've been trying a couple of Android devices. I used to focus on iOS but I become a little bit bored with it lately. The deep customisation options on (rooted) Android devices began to fascinate me again.When I played around with a recent and quite good Samsung tablet I ran into a couple of issues with Titanium Backup and an external 128GB SD Card. By the way rooting of said Samsung tablet is easy and straight forward.Namely when trying to back up a couple of applications to that external SD Card, Titanium Backup showed: "readonly" / "this folder is not writable". That seemed strange as I had even formatted the SD Card in the freshly set up tablet.Well after a quick google search here is the solution (you will need root access, a file manager and a text editor - I used http://www.estrongs.com/?lang=en )

• navigate to : / system /etc/ permissions/platform.xml
• finde the section "WRITE_EXTERNAL_STORAGE"
• inside that section add the following line:  <group gid="media_rw" />

After a reboot of the device read and write SD Card access from within Titanium Backup worked fine.