[GUIDE][TOOL] Dreamtab increase internal storage - Fuhu Nabi 2

Summary​
Uses an external micro sd as "internal storage". Accomplished by a ramdisk edit to the boot image. The bootloader must be unlocked to use this tool and unlocking the bootloader will erase all personal data, game saves, etc on your device. For devices that already have their bootloader unlocked there is an option to transfer the current data to the external microsd card.
Considerations​
-The bootloader needs to be unlocked. The unlocking procedure erases all data on the device. If games saves, etc, are important use a tool that can back them up first.
-If you already have an unlocked bootloader the script allows you to transfer the data over and it should be like nothing ever happened but an increase in space. However, scripts are not perfect, nor can I take in to account every situation that might arise. If you have an unlocked bootloader and your data is important, please, please, please make a backup before trying this script.
-Micro SD card quality. All data will be read and written to the micro sd card. Not all cards are created the same. Many have very poor write performance, especially 4K writes. I tested about 6 or 7 cards and found the Samsung EVO+ as the best performing card. I didn't test the SanDisk extreme but it will likely be good as well. Increasing the size available is of no use if the speed is terrible and the tablet is laggy.
-Drivers. You must have fastboot and ADB drivers already set up and ready to go. The drivers are always a pain because so many different computers have different setups, previous drivers installed, conflicting drivers, etc. I attached the NabiLab2017 drivers to the post, even they can be buggy but provided an option if you choose. More about driver setup can be found here https://forum.xda-developers.com/nabi-2/general/nabi-information-t3229119
Procedure​
ONLY FOR NVIDIA NV08B
Video: https://www.youtube.com/watch?v=aka8nUu7qQY
Video with data transfer: https://www.youtube.com/watch?v=ZbxqtzV33jI
ADB and fastboot drivers setup and tested
Micro SD card you want to use installed
Device connected and booted to Android
Unzip and run convert.bat
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Thanks (again) @aicjofs for all the work you continue to do on these Nabi Dreamtab HD8s. TWRP, fsck fixes, stock 137 TWRP backups, and now this (which cures my biggest gripe about these tablets).
My kids are rough on them, but, because of the work you do, I've been able to keep them going & they grow with my kids. I just picked up 2 more refurbs from eBay today for $50 each. I'll be applying this internal storage fix as soon as they arrive.
I'm a Linux guy, not Windows. Would it help if I contributed a bash script that mimics your convert.bat? I'd have to assume that adb & fastboot are already installed & running, but I could probably script most of if from that point.

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jvonhoff said:
Thanks (again) @aicjofs for all the work you continue to do on these Nabi Dreamtab HD8s. TWRP, fsck fixes, stock 137 TWRP backups, and now this (which cures my biggest gripe about these tablets).
My kids are rough on them, but, because of the work you do, I've been able to keep them going & they grow with my kids. I just picked up 2 more refurbs from eBay today for $50 each. I'll be applying this internal storage fix as soon as they arrive.
I'm a Linux guy, not Windows. Would it help if I contributed a bash script that mimics your convert.bat? I'd have to assume that adb & fastboot are already installed & running, but I could probably script most of if from that point.
Click to expand...
Click to collapse
Absolutely contribute, I don't do this for fame or money, just try to help others. Any and all additions are always welcome.
It should be easy enough to convert as most of the magic happens on the tablet itself, I think I only pushed a couple files to the tablet and made the ramdisk changes on the tablet too to keep the file size down. Weird how TWRP, the kernel, the tablet itself is all done in Linux but I only make windows scripts/apps.
I have quite a few of these tablets too, 5 maybe?. Kind of weird because Fuhu/Nabi screwed up that fsck thing so many people dump the tablet for next to nothing because they seem like garbage and crash all the time with loss of all the kids data but they are really a solid tablet. Try and find a screen of the HD8 quality on a modern kids tablet for $50. Shame about the crappy source code, if I could have got the camera to work right in the kernel I think I would have pressed on with the lollipop ROM and instead lost interest. This mod though breathes a lot of life into it still though. I have 3 of these running the mod and the kids still use it all the time with 64GB cards as their main storage and have had no issues.

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aicjofs said:
Any and all additions are always welcome.
Click to expand...
Click to collapse
I've attached my attempt at a bash script for the swap. I got time to run one of my tablets through the gauntlet with this version, and only hit a snag at the check for fsck. Since I was that far, I just fixed the bug & applied the rest by hand. So, beware.
aicjofs said:
if I could have got the camera to work right in the kernel I think I would have pressed on with the lollipop ROM and instead lost interest.
Click to expand...
Click to collapse
I hear you there. I was hoping to see you get Lollipop going (even w/o a camera), just to have the battery saver. But, Greenify does a pretty good job keeping the battery going a while. So, again, thank you, and let me know if this script needs fixing.

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Thanks for the work on this tablet. I am trying to salvage our dreamtab with your method. Unfortunately, I have a card inserted but the convert.bat never gave me any information about the sdcard like it did for you in the youtube video. Any idea what I might be doing wrong?
Thanks again!