When I got this phone I was disappointed with fact that primary storage isn't switchable and free user data space is approximately 2.2 GB. Which means that all application data goes to internal storage so it is impossible to use apps like Need for Speed, Navigation app, ShowBox and others. I believe you all find that annoying.
After I saw @Dhruvit Pokharna topic I started to poke a little bit over XDA and I noticed that this was done before ( back in 2012 ) and with various Samsung phones. So I decided to change and adapt script for our phone. Original script was created by @mattiadj from whom I still waiting for permission to change script and to publish it. But I'am going to do it anyway.
What the script do:
It swipe internal sd (/storage/sdcard0) with external micro sd (/storage/extSdCard) and viceversa.
"With this you can use default internal sd only for app storage and the external sd to store all apps resource and all others stuff"
- custom recovery
- kernel with init.d support
How to and why:
Before installing swap if you moved some apps to sd move it back to phone to avoid conflict of course.
1. Root your phone first
2. Install custom recovery *(here or here)
3. Make a backup. Just in case of zombie attack *
4. Install kernel with init.d support *(here or here)
5. Install BusyBox-v1.23.0-Stericson.zip (flashable provided below )
6. Install swap_intsd2extsdcard_SM-G355HN.zip (flashable provided below)
7. Why * because you have choice
That's it. Your external sd is internal now and you can enjoy your big internal memory.
If you want to reverse it simply go to /system/etc/init.d delete 11extsd2internalsd and reboot your phone.
@mattiadj and @mike1986.
Some screenshot just for you to see switch and mount points: