if you feel like repartitioning your device or just try something new. Now you can...
I had a look at the partitions of our device and thought of merging the userdata and sdcard0 partitions to gain more space and using the newer storage layout with data/media. After searching I found some infos, changed a script and voila it worked and now I have one partition for data and media.
Caution playing with the partition table is very risky and can damage your device permanently or to say it can brick!!!
Make every backup you can thing of!
So maybe go into QHSUSB__BULK mode by using attached Send_Command.exe like stated below, where comport is your actual port like COM9.
Send_Command.exe \\.\comport # ENTER
Get a copy of HDD-Raw-Copy-Tool or similar like EMMCRAW. Make a hard copy of your device memory.
Make definitively a TWRP backup.
Now use this zip and flash it via TWRP, note that you should put the zip on a external sd card or use adb sideload.
Next you should got into wipe and select format data, type yes and acknowledge it.
Now you should have more than 11GB as data storage, see pics in the attachment.
When you do the switch you should also switch TWRP to one which do not support sdcard0, cause this partition is gone
Please note: This mod will like not work properly if your using stock rom from zte!
I also made a zip for spliting and recreating the sdcard0 and userdata partitions, after using it, you should also format data like described above. And format your new sdcard0 partition properly as fat. This zip works also, I tested it. Maybe one can improve the script, saving extra formating the partitions.
This zip should provide infos about the partitions of your device...
petrov.0 and his thread, which has all infos and the original zip files, which I modified