Here is a small how to backup & restore all of your data.
1. First connect your box to your PC via mini USB cable and change the USB settings to OTG.
Settings > Ugoos settings > Hardware > USB switch >> (OTG)
1.1 Copy (backup) all files from the internal (virtual) SD card to a folder on your PC
2. Now disconnect the USB cable, shutdown your Box and start into TWRP recovery.
To start TWRP recovery hold the REST button and press once the Power button.
Note: To use TWRP U need a USB mouse connected to you box.
2.1 In TWRP select Backup > Select Partition to Backup: Data (excl. storage) only
(The storage of the internel SD is already backed at step 1.1. SO no worrys )
And if needed, depends on the free space of your micro SD card, enable compression to save space (backup will slower but needs less space).
> Select Storage > Micro SDCard >> ( OK )
>> ( Swipe to Backup )
Note: To use USB OTG as backup storage with my ROM 2.0, you must connect the USB stick to the micro USB OTG plug. This issues is fixed with the new ROM V2.5 and TWRP 3.10. There you can use any USB port to backup your stuff
3. Now all your data is saved and you can install the new version of my rom.
4. After first boot. connect you PC again to your box (see step 1.) and delete all files on the internal (virtual) SD Card.
Then copy the data backup we made at step 1.1, to you internal (virtual) SD card.
5. Start TWRP to recover your Data partion
Restore > Select Storage > Micro SDCard >> ( OK )
Select Package to Restore: (select your back) > Data (excl. storage) >> ( Swipe to Restore )
Important: Wipe > Advance Wipe >Select [x] Dalvik / ART Cache & [x] Cache >> ( Swipe to Wipe )
Reboot >> ( System )
DONE
Much success and fun

Edit ... for those of you who have no custom recovery installed.

In those cases you using a different ROM (like stock, etc) without any custom recovery installed. You just have to install the TWRP custom recovery I made for my V2.5 BRE ROM. This version should also work with any other RK3368 boxes/roms. So give it a try to make full backup of your current ROM.
Download: RK3368 TWRP 3.10 by cOOLio
A short how to install my TWRP image is already included to the 7zip file. After installing it, anythings else should be similar as mentioned already above.
In case your rom does not support USB OTG, just copy anything from step 1, 1.1 to a USB stick or external SD card.
And in case your installed ROM (stock firmware) isn't rooted already, check this.
Attention: To recover a data partition from a different ROM to my ROM, could have strange side effects. It could work, but there is no guarantee. So in case you getting strange issues, after you recover you data partition to my ROM. it will not work. So in that case TWRP is only to make a full backup of your current ROM. To get back where you came from, in case you don't like ATV.
Much luck and fun
cOOLio
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